Customers asking about "molleton covers" aka dampener covers (and a few other variations), here are some items to consider:
Do you have a specific brand in mind?
Veratec (or now Fiberweb) sells: Red 1, Red Runners, and Hytons. They are mostly red in color.
Jomac (now part of the Base-Line group) sells: J-Lastic, GreenSleeves, WaterSleeves, A-Tex and many others. They are white, green or blue in color.
Lithco L-Tex covers are white, Syn-Knit is black, Lithco Premium Blue STF is blue.
Is it for a ductor or form or set?
In most cases the form rollers and ductor rollers are different in size so specifics are needed.
When ordering sets please be aware that some presses have two ductor rollers and one form, in which case the set is composed of 3 covers.
Usually, though, there is one form roller and one ductor cover per set.
Once mounted on the rollers the loops need to be on the outside.