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Some people call these a bronze bobbin. These are the favorite metal bobbins for longarm. They have the cooling holes for speed and the little slot to fit on the built in bobbin winder on Gammill Longarms. They are not sticky and they last and last. They are a little more money but worth every penny. Size M. Pack of 10
Item#1143SU

These are metal and slotted and are the type that goes into a bobbin case. 5 in a package.
Item#1717

These are plastic and the type that goes in a top loading Janome. 10 in a package.
Item#SH-102261103

One box of white clear quilt bobbins. 100 Prewound bobbins in a box.(pictured in color only to show the clear bobbin.)
Item#QCA101

Foot pedal and its own thread tree and motor, bobbin shaft adjustab;le to any size bobbin.
Item#QCA100

This Bobbin box holds 25 bobbins and is made of a plastic that you can see through well enough to identify the bobbin you want.
Item#10C

This rubber ring holds either size L bobbins or size M bobbins. I love mine and it kind of sticks to the sewing table and if I bump it-it stays right where I put it.
Item#BBSV

White
These pre-wound bobbins are 100 percent cotton the long stapel egyption cotton. The core is magnetic and replaces the need for a backlash spring in the bobbin case as it stops coasting of the bobbin. They come 100 in a box. (pictured in red because the photo is better)
Item#QCA102sizeL

Box of 7 tubes with 10 bobbins per tube color= Tan

Item#QCA103SizeL

Box of 7 tubes with 10 bobbins per tube. color = Cream
Item# QCA104sizeL

Box of 7 tubes with 10 bobbins per tube. color = Black
Item#QCA105sizeL