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 :
4mm B/BB Laserply A4 pack of 100 sheets
Choosing the Right Wood for Your Laser Cutting or Engraving Project
Amazon.com: Baltic Birch Plywood, 3 mm 1/8 x 12 x 12 Inch Craft Wood, Bag of 8 B/BB Grade Baltic Birch Sheets, Perfect for Laser, CNC Cutting and Wood Burning, by Woodpeckers :