Singer SR-120 ribber is an 8-mm gauge attachment to work with bulky basic/manual knitting machines with model numbers Silver SK120, and Silver Reed SK120, (also known as Kantant Bulky, Silver Kantan, Fancy Bulky), Studio Bulky Eight, and Studio SK120.

These ribbers appear on the market in the early 1980s to supplement the mentioned above machines (which were released in the late 1970s).

These ribbers have a lot of modern-looking features and looks despite being an accessory to the basic/manual knitting machines. For example, a retractable/foldable carriage handle.

It is identical to its clones: Silver Reed SR-120 and Silver SR-120 ribbers.