Machrus Ogrow Polycarbonate Replacement Panel F-39 fits items # OGAL-466A, OGAL-666A & OGAL-866A. This is part number F-39/SKU #OGRPT-F-39 on Ogrow Greenhouse Manual. The size of this panel is 23.54 x 23.54 x 0.5" (L x W x H). The polycarbonate panels are safe and easy to handle and make your greenhouse shockproof and UV resistant. Get this Machrus Ogrow replacement panel to fix any missing/damaged panels on your Aluminum Greenhouse!