These colourful 3D printed Ball Bearing replacement bobbins have been designed and manufactured in the UK using UV resistant materials. Each bobbin weighs just 4g which is perfect for hangers, swingers and springers. For those wanting to add more weigh, you can simply screw on additional weights to the bottom.  
 
Each head has two ball bearing grub screws at the top, both are full adjustable with a small 3mm Allen Key. (Not provided)
 
You are purchasing 3 (three) NEW bobbin heads in one colour.
30mm x 16mm Dia weight 4g per head.
 
Free Shipping.