WebPress supplies three main kind of cutting rubbers.
BLACK: These are for use on Atlas folders. They have 8 grooves. Part # 1615080
YELLOW: These are for use on Web Leader folders. They have 6 grooves. Part # 615080
ORANGE: This color is specifically for use with 27" wide webs. Three customers currently order this type. Part # 1615180.
These cutting rubbers all have the same durometer: 85. WebPress does have the ability to offer other durometers if necessary. If you see the need for that, please contact us to discuss.