Hawaiian Koa 4A+–5A Curly Wood 2-Piece Set #KOA-928 / KOA-929
■ Product Description
Hawaiian Koa 4A+–5A Curly
Rare High-Grade Hawaiian Koa 2-Piece Wood Set
Item Numbers: KOA-928 / KOA-929
This rare 2-piece set combines one 5A (High Grade) and one 4A+ (High-Mid Grade) piece of Curly Hawaiian Koa.
Both pieces feature the distinctive golden-to-brown natural coloration of Hawaiian Koa, enhanced by beautiful three-dimensional curly figure that changes in depth and appearance with the viewing angle and light.
KOA-928 measures approximately 540 mm long, while KOA-929 measures approximately 458 mm long. Both pieces are approximately 50 mm wide and 20 mm or more in thickness, providing excellent flexibility for custom cutting and processing.
These high-grade figured pieces are ideal for musical instrument components, handles, accessories, small custom items, fine woodworking, and craft projects where the natural beauty of Curly Hawaiian Koa can be highlighted.
The wood is sourced directly from suppliers on Hawaii Island and supplied as part of an ongoing reforestation project.
■ Grade
KOA-928: 5A (High Grade) Curly
KOA-929: 4A+ (High-Mid Grade) Curly
■ Scientific Name
Acacia koa
■ Set Contents
Hawaiian Koa 2-Piece Wood Set
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KOA-928 × 1 piece
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KOA-929 × 1 piece
■ Size
KOA-928
Approx. 540 × 50–57 × 20 mm
(Length × Width × Thickness)
KOA-929
Approx. 458 × 50 × 21 mm
(Length × Width × Thickness)
■ Moisture Content
KOA-928: Approx. 13%
KOA-929: Approx. 11%
■ Wood Information
Species: Hawaiian Koa
Scientific Name: Acacia koa
Origin: Hawaii Island, State of Hawaii, USA
Sold As: 2-Piece Set
■ Features
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High-grade 4A+–5A Curly Hawaiian Koa
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Rare 2-piece set with two individually figured pieces
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KOA-928: 5A (High Grade)
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KOA-929: 4A+ (High-Mid Grade)
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Beautiful three-dimensional curly figure that changes with the viewing angle and light
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Rich natural golden-to-brown coloration
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Flexible dimensions for custom cutting and processing
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Suitable for musical instrument making, fine woodworking, and specialty craft projects
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Directly sourced from Hawaii Island
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Supplied as part of a reforestation project
■ Recommended Uses
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Musical instrument components
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Ukulele and guitar components
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Knife handles
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Tool handles
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Pen and turning projects
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Accessories and jewelry
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Inlays
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Small custom wooden items
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Fine woodworking and craft projects
A rare 2-piece high-grade Curly Hawaiian Koa set, combining beautiful 5A and 4A+ figure and offering two distinctive pieces for custom instrument making, fine woodworking, and specialty projects.
Why Is Everyone Obsessed with Koa?
You may often hear people talk about “Koa,” but what exactly is it?
Hawaiian Koa is one of the most prized and iconic tonewoods in the world, valued for both its beauty and sound quality.
About Hawaiian Koa Wood
Hawaiian Koa (Acacia koa)
Hawaiian Koa is a special wood that has been treasured by the Hawaiian people for hundreds of years.
Historically, it was used to make:
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Outrigger canoes
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Paddles
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Boxes
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Furniture
Today, Hawaiian Koa is highly regarded worldwide as a premium material for musical instruments such as ukuleles and guitars.
It is known as an excellent tonewood, producing a rich, warm, and balanced tone with beautiful visual character.
About Scarcity
Hawaiian Koa has a very limited supply due to extensive logging in the past.
Large-scale reforestation efforts have only begun relatively recently.
As a result, high-quality Hawaiian Koa is becoming increasingly rare every year, especially highly figured material.
About Grading
Grading Information
Our grading system is based on over 50 years of experience handling and supplying tonewood.
It is our own internal quality standard.
In the general market, terms such as “4A” and “5A” are widely used, but grading criteria vary from company to company.
By understanding our grading system, you can be confident that each grade meets a consistent and reliable quality level.
Grade Criteria (Simple)
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1A–2A: No curl to very weak curl
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3A: Medium curl visible at certain angles
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4A: Strong curl visible from any angle
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5A: Master grade with deep, beautiful curl
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5A+: Extremely rare, top-tier figure
Moisture Content & Drying
Our wood comes from naturally fallen trees or logs that have been air-dried in the forest for long periods.
Because of this, some pieces are ready to use, while others may require additional drying.
Hawaiian Koa is known as a wood that dries easily and is resistant to cracking and warping compared to many other tonewoods.
Easy Drying Method
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Place the wood so air can circulate freely
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Store in a well-ventilated area
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Use a fan to circulate air if needed
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Place a light weight on top to reduce movement
For material 20–30 mm thick, the recommended drying period is approximately 2 months in a well-ventilated environment.
Recommended Uses
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Ukulele making
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Knife and tool handles
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Pens, accessories, and inlays
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Box and small craft production
Measurement Notes
Because this is a natural wood product, the following dimensional variations may occur:
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Thickness: ±0.2 mm
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Length: ±5 cm
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Width: ±3 mm
The material is not a perfect rectangular prism, which is a natural characteristic of solid wood.
Please understand this before purchasing or processing.
Detailed information
Tree species: ハワイアンコア
Thickness:
Length:
Width:
Backing:
Number of leaves:
Made to order: KOA-928-929