1 Piece Birch wooden Wool Yarn Roller swift umbrella Winder medium, Swift Yarn Winder Umbrella Wooden BRAND NEW! Yarn Swift Ball Winder Your are now watching a brand new medium Birch wooden Wool Yarn Roller swift umbrella Winder . Maximum open circle: 188cm/74 inch Material: Birch Clamp thickness: 1.5"/4cm Umbrella Style