SINGER 2139 Class 66 Bobbins, Metal, 4-Count,

Works perfect for my machine.

Perfect! This is the bobbin I needed for my old Singer 4562

The transparency of these bobbins is a game-changer. Being able to see the remaining thread supply at a glance saves me time and frustration, ensuring I never run out of thread unexpectedly mid-project. It's a simple yet ingenious feature that enhances the overall sewing experience.In terms of performance, these bobbins excel. Crafted by a trusted brand like SINGER, they boast exceptional quality and durability. I've found that they wind smoothly and evenly, resulting in consistent tension and stitch formation. Whether I'm working on delicate fabrics or heavy-duty projects, these bobbins deliver reliable results every time.The pack of four bobbins is also a great value proposition. It provides an ample supply to keep my sewing without interruption, and the convenient storage case ensures they stay organized and easily accessible.

Bobbins are a perfect fit for my Singer Sewing machine.

For reference- I bought these for my 1992 Singer 5705C. None of my local craft stores carry this bobbin model anymore, so I'm glad Amazon had them. They're perfect, but there is a caveat- be careful how many you order! I purchased 2 of what I thought were single packs. I wound up with 6 packs, for a total of 24 bobbins. I don't need 24 bobbins, so I'll be giving some away, but for the price, I'm not mad! However, I was very surprised when I opened the package and saw 3x the number of bobbins I wanted.

Actually a zero. Does not fit the bobbin winder on my old 201, although it claims to. The small hole that locks the bobbin onto the winder is not close enough to the center, so they’re basically a useless waste of money.

Worked well on my old singer 5205C MODEL

I think they aren't quite as good as my 30 year old Bobbins but they are good and get the job done. Good price and better than the generics I returned that were aweful. These are good and fit right in the machine.