... of the rolls Stepless pressure regulation S-Roll calenderMain applications:l Luggage and Backpacks, Parachutes, Kites, Sailing boat, Umbrellas, Beach chairs, ... . Main features:l Utilize the stepless pressure regulation S-Roll, achieve the uniform line pressure by adjusting the oil ... roller sleeve coated on the stepless pressure regulation S-Roll roller can better recover the deformation of the roller ...