Made of metal material, it has a smooth surface, anti-oxidation, not easy to rust, durable and will not deform over time. Shop The Lord of the Tools Retro Bullet Sewing Machine Spools 8.8 x 32 mm Compatible with Singer 27 28 127 and 128. Free delivery on eligible orders of £20 or more Very good vintage condition with typical signs of age similar to the example shown, rust free. How Do You Replace the Bobbin Case in an Old Singer Sewing Machine: 11 Easy Steps Applicable Models: Singer Vintage 27~28~127~128,Perfectly fits a range of Singer vintage models for seamless integration. Compatible Parts: #8225 Bobbin,Compatible with #8225 bobbins for reliable and consistent sewing Compatible with Singer 27, 28, 127, 128 sewing machines , The size is 8., 8x32mm, please check carefully. Equipped with 10 bobbins at a time, it is convenient for multi-color threading preparation, saving thread change time and improving sewing efficiency. Metal Bobbins For Singer Sewing Machine 5 X SINGER Sewing Machine Bullet Shuttle Bobbin Case 3 Pin Bobbins Simanco 8301 £28.99 - PicClick UK Sewing Bobbins For Singer Machines