Passap BLUE Stripper - The blue stripper is an essential part of the Passap DuoMatic knitting machine for doing double bed fabrics and ribbed fabrics using heavier weight yarn or whenever you require more pressure on the knitting. The blue stripper is the same structure as the orange stripper, but with a heavy duty spring inside to exert more pressure on the knitting. Blue strippers for the passap DuoMatic machines are sold individually. For more information about strippers, please refer to the Passap paramedic. Fits the Duo 5 (Pink), Duo 80 and E6000.