Specifications 6mm (1/4") Thickness B/BB Grade Baltic Birch Plywood Veneer Core Birch Veneer on Both Sides Plywood sheets are about 1/4" smaller on each dimension due to saw blade kerf when cutting. B/BB will be clear on one side and may allow for a football patch on the other side. Store sheets flat with weight on top to avoid warping. We've used this material in all of our machines and our customers have used it in many others. Due to increased demand, we have expanded into a variety of sizes.  These sizes are intended to be compatible with the following machines: Glowforge, XTool, K40, OMTech, Thunder, Aeon, Boss, AP Laser, Epilog, and Trotec.  Please contact us for other size requests. Processing & Shipping All prepacks ship free All 12" x 19" prepacks ship out same or next day All other size prepacks ship out in 1-3 days Free shipping is available to Alaska, Hawaii, or any US territories for prepacks in the following sizes: 12x12, 12x16, 12x19, and 12x24. Custom or Bulk OrdersPlease contact us at contact@creativecutsupplies.com for any custom or bulk order requests.Bunk ShipmentsWe ship full and partial bunks across the country.  Contact us at contact@creativecutsupplies.com for any bunk quantities you may need.