S585-5/16 | Not available 1/4" is largest

18034W | B9117-201-000 | BO-DBM(1) | "M" class Bobbin w/Slot for various walking foot compound feed machines. Chrome/White Metal.

SIN-97738/43PH 1/4" *|* Heavy Duty Piping Foot Set Singer 132K6

SIN-97743 Singer 132K6 outer Presser Foot (was 97754) or CS-1408

SIN-82007 | Presser Foot for Singer 29K Boot Patcher HA-46040-A 8666

SIN-97738 | Singer Presser Foot (Inner) or CS1403 Seiko 97744