actvty square silicone molds for resin casting - large, deep molds for flowers & insect specimens - diy resin art gifts & home decoration (6.6'' x 2'') square resin mold is up for auction in Arts, Crafts & Sewing. The current bid is $0.10, 99% below the $12.34 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.