Common thicknesses are 3mm (1/8") for colors and 3mm (1/8"), 6mm (1/4"), 12mm (1/2") and 19mm (3/4") for white. Should the backing plates are worn, cracked or pulling away the mast, consult your rigger. http://bookmarkloves.com/story6319902/bat-rolling-machine-extremely-hard-rollers-break-bats