This rubber winder is designed to accommodate most machines as it stretches around your pulley, ensuring a flexible fit that adapts to various models. Specifically, it is compatible with Singer sewing machines such as 201K, 99K, 28K, 66K, 128K, 15K, and 185K, as well as the majority of sewing machines on the market.
Please be aware that it is not compatible with the Singer 1890's 128K/28K V2 version featuring a larger bobbin winder.