The SpinOlution 16oz bobbin is crafted from durable Baltic birch with a built-in clip that holds your leader thread securely, making it quick and easy to start a new bobbin. The magnetic locking system holds the bobbin in place against the flyer rod, so changing bobbins mid-spin is fast and friction-free. Choose Your Shaft Diameter SpinOlution's 16oz bobbins come in two shaft diameters due to a 2017-2019 transition in flyer rod sizing. Before ordering, measure either the hole in an existing 16oz bobbin or the flyer rod diameter directly: Wheels made before 2017: 1/4 In rod Wheels made 2018 onward: 3/8 In rod Wheels made 2017 to 2019 transition window: may be either, measure to confirm Ordering the wrong shaft diameter is the most common mistake on SpinOlution bobbin orders. Take a moment to measure before adding to cart. Compatibility The 16oz bobbin fits any SpinOlution wheel that uses a 16oz flyer: SpinOlution Echo SpinOlution Monarch SpinOlution Firefly SpinOlution Hopper SpinOlution Bullfrog SpinOlution Worker Bee Specifications Capacity: 16oz (approximately 545g of yarn) Material: Baltic birch Shaft diameter: 1/4 In or 3/8 In (variant selectable) Magnetic bobbin locking system Built-in leader thread clip Personalize with Engraving Add Wildflowers or Honeycomb engraving to this bobbin through the SpinOlution Bobbin Engraving option. About SpinOlution SpinOlution spinning wheels and accessories are designed and crafted in the USA. Browse the full SpinOlution Bobbins collection for additional capacities from 4oz to 64oz.
