This replacement bobbin case shuttle with tension spring (Part # 81952) is a new Towa-brand component made in Japan for select Singer 29K industrial sewing machines. Designed for use with the large bobbin (3/4" diameter). Also cross-references as Part # 81993. Part #: 81952 (also 81993)Brand: Towa (Made in Japan)For use with: Large bobbin (3/4" diameter)Includes: Bobbin case shuttle with tension springCondition: NewType: Replacement Compatible Singer Models 29K, 29K2, 29K3, 29K4, 29K10, 29K11, 29K12, 29K13, 29K14, 29K16, 29K17, 29K18, 29K21, 29K22, 29K23, 29K30, 29K31, 29K32, 29K33, 29K51, 29K53, 29K55, 29K56, 29K60 Also available: Metal Bobbins for Singer 29K - Part # 82552 (6-Pack) Important: This bobbin case is for large bobbin (3/4" diameter) models only. Verify your model number and bobbin size before ordering. Compare to the photos to confirm fitment. Confirm part compatibility with your specific machine before ordering. Part numbers and photos are your best reference.