This listing is for a 15 parts set for many singer treadle sewing machines, that consist of :

183cm(72") long & 4.8mm(3/16")diameter Leather Belt with 2 hooks

2 bobbins #2518 with size : 20.50mm diameter X 10.80 mm thick

10 needles HAX1 15X1 SIZE 90/14

1 awl

1 thread guide