The Brother Bobbin Center Pin converts smaller 9.4 L sized bobbins to fit 11.5 15J size bobbin machines. Mostly used with prewound bobbins.
Brother Accessories & Spares
Brother XF5048001 L Bobbin Guide Spacer Attachment, Center Pin, Instructions for using L Type Plastic Bobbins in Class 15 Drop In Bobbin Case Machines at
Brother Innov-is 1000 Sewing & Embroidery Machine
Brother Accessories & Spares
Brother Bobbin Center Pin Guide Adapter XD0835051 - 1000's of Parts - Pocono Sew & Vac
Bobbin Guide Assembly, Brother #XD0835051 : Sewing Parts Online
Sew Many Parts
ERGO BOBBIN ADAPTER – 1lastcastlures
Coverts class 15 machines to accept L class bobbins. Use this adapter/spacer with Class L bobbins in a machine that normally uses Class 15/A bobbins
Brother XD0835051 Bobbin Guide