Amazon.com: Baltic Birch Plywood, 3 mm 1/8 x 12 x 24 Inch Craft Wood, Box of 12 B/BB Grade Baltic Birch Sheets, Perfect for Laser, CNC Cutting and Wood Burning, by Woodpeckers :
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Amazon.com: Baltic Birch Plywood, 6 mm 1/4 x 12 x 12 Inch Craft Wood, Box of 25 B/BB Grade Baltic Birch Sheets, Perfect for Laser, CNC Cutting and Wood Burning, by Woodpeckers :
Nervous System's quest for the best laser-cutting plywood – Nervous System blog