1/4" White Maple Ply on MDF Core Laser Cutter's Bulk Pack 12"x20" - Woodworkers Source
Top 5 Plywood Sheets for Laser Cutting Hobbyists
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 :