71" 3/16" Leather Belt Treadle Parts with Hook for Singer/Jones Sewing Machine Round 3/16" (5mm) diameter for many singer treadle sewing machines Usually all treadle machines use a belt that is approximately 68" (173cm) long & 3/16" (5mm) in diameter. Simply measure your old belt (if available) against this new belt ,cut the excess length off, puncture ( using an awl or nail) , than insert the end with the metal hook. Size: 72" (183cm) long & 3/16" (5mm) diameter. Used for old Singer cabinets and Manual Rocking Foot Pedals.