Genuine OEM-quality replacement part. Model-specific (internal/rotating part) — compatible with the machine models listed below. HSH-31B Rotary Hook — genuine-fit aftermarket part supplied by Supra Sewing. Rotary hook for 8B class machines. Type: Sewing Parts Brand: Generic Part No.: HSH-31B Compatible Machines SPEEDWAY: SW 8B-2A SEIKO: 21W162, 110K, 110W124, 128, CW-1, CW-7, CW-7B, CW-8, CW-8B, CW-8V, CW-8BV SINGER: 131W, 47W70 CONSEW: 207, 223, 223R, 227, 382, 388, 389 GOLDEN: WHEEL CS-8BH TYPICAL: TW3-8B