3.5mm Baltic Birch Plywood sheets perfect for Glowforge/Laser Cutting so

19.75x11.75" Baltic Birch, 2 sided plywood with veneer core. B/BB grade. Works perfect with Glowforge, Mira, K40, Thunder laser, etc... ***WE DO OUR BEST TO SHIP NICE, FLAT PIECES BUT PLEASE KEEP IN MIND THAT BALTIC BIRCH WARPS EASILY AT THIS THICKNESS****. Hold down pins or magnets are always recommended.. Boards are cut 19.75" by 11.75" by hand. There may be very slight variations but they will be very close to the size listed. These boards fit perfectly within a Glowforge and cut/engrave perfectly. We have been using this wood for over a year and are very happy with the results. This wood is great for all your crafting needs: Glowforge Hobby laser Wood Burning CNC machine Sign Making etc. Recommended settings: Baltic Birch = Med Basswood ply (proofgrade setting). These settings are a good starting point for your Glowforge but may need to be adjusted to your specific machine/conditions. ****** All Continental US and non PO Box orders are shipped via UPS Ground. Shipping rates are as follows: MDF/WHITE MDF/BLK MDF Medium Box $18 ---- 1-12 sheets Large Box $24 ---- 13-25 sheets XL Box $32 ---- 26-50 sheets ALL OTHER 1/8 MATERIAL, EXCEPT FOR POPLAR Medium Box $18 ---- 1-10 sheets Large Box $24 ---- 11-20 sheets XL Box $32 ---- 21-40 sheets