The folding height of filter paper is available: 8 - 60mm. Different folding height needs different folding rollers. One folding roller can do one folding height.This machine is equipped with one requested folding roller. If needed, more rollers can be ordered. The roller size in china normally used have 7 types, that is 48mm,45mm, 42mm, 36mm, 33mm,28mm, 11mm. 2.folding speed is adjustable: 8mm/min-40mm/min 3. The machine has electric ( after ) heater: output=2.6KW Temperature adjustable 0-250 C 4. This machine can be made as customer's requirements.