Review on 🧵 10-Piece Set of Sure Fit Bobbins for Inspiration Models - Compatible with Singer Models: 4205, 4206, 4210, 4212, 4220, 4228 by Kelly Caballes

They are perfect for my inspiration 4220! I bought my machine used and it had so many bobbins in it. But I noticed that my machine wasn't sewing properly. The thread is either too tight or too thin. No matter what I tried, the upper thread would get caught causing the lower thread to tangle. Then I read in the manual that this machine only uses certain coils. When I received them I compared them to the ones I already had and you can see the microscopic difference! I couldn't find them in store so I went with Revain but was a bit skeptical. This fixed the problem I was having, and since then I have had no more problems with my machine! If you're having trouble, try this! But only if your machine requests exactly that. Check your manual to see which ones are used in your car!