Studio SR155 ribber is an accessory for the Studio mod. 155 as well as other knitting machines with the 155 model number: Singer mod. 155, Silver Reed SK155, Silver Reed SK155P My Studio, Empisal Knitmaster mod. 155. It is similar to the Silver Reed SR155 ribbing attachment.

Thus, Studio SR155 ribber is a bulky-gauge needlebed with 110 needles, 9 mm apart.

The goal of the SR155 ribber is to convert a knitting machine into a double bed to knit ribbing and other patterns.

I have an SR155 ribber in my stash, so stay tuned for more first-hand information.