2 pack of Replacement Drive Belts for Lortone 33B, 3-1.5B, and 45C Tumblers 2 x replacement drive belts for Lortone 33B, 3-1.5, and 45C model Tumblers Keep your Lortone tumbler running smoothly with genuine Lortone parts 4" approximate outer diameter (105mm) 12.5" approximate circumference (330mm) 7/16" (5mm) thick