Cardboard Cones for Crafts, Winding Yarn, Lot of 75, Works with Cone Winders

They work with Electric cone winders. There are mages showing the notch and the purpose of the notch. One is of a close-up of putting the pigtail in the notch. The other image shows a cone of yarn without a notch and the result of what can happen when putting yarn on a cone without the notch.

Cone Winder

Cardboard Cone

Cardboard Yarn Cones

Yarn Winders — CSM Love

These are perfect for winding off yarn so you can put multiple strands of yarn into your tufting machine.One Cardboard Paper Cone for Yarn◆ #1：It

#2 Yarn Cones

Yarn Winders — CSM Love

Cone Winder

Cardboard Cones for Crafts, Winding Yarn, Lot of 4, Works with

They work with Electric cone winders. There are mages showing the notch and the purpose of the notch. One is of a close-up of putting the pigtail in

Cardboard Cones for Crafts, Winding Yarn, Lot of 75, Works with Cone Winders

Spare Cone for U-nitt Jumbo Yarn/Wool Ball Winder