These Singer Class 15 Bobbins are the perfect choice for a huge range of machine sewing projects! The clear plastic bobbins fit most front-loading sewing machines where the bobbin is loaded into a case, then the case is inserted into the sewing machine from the front. There are 10 bobbins included in the set, made from transparent durable plastic. Theyre designed to last well and will be easy to transfer your threads onto, ready for your machine sewing projects. Pack size: 15.8 x 7.6 x 3cm (6.2 x 3 x 1.2 inches) 10 pack Class 15 bobbins for Singer machines Front loadingMade of durable plasticCapable of taking a notable amount of thread before attachingSinger Class 15 Bobbins 10 Pack