Floater frame shim kit - SpacerKit
This spacer kit is exactly what you need to get your art centered in your floater frame. The kit includes 3 different materials all cut to 2" squares that are different thicknesses so that you can make subtle changes to get your art centered perfectly. There are 8 pieces of 3/16" foam core, 22 pieces of 1/16" mat board, & 21 pieces of 3/32" hard board.