The new pulleys are made of a blend of new materials that introduce reduced weight but at the same time the main strength remains unparalleled in time without the drawbacks of the older pulleys (without ball bearings) that after time had deformity of the inner lumen and reduced spin rate.
The rollers incorporating spacers to move freely away from the side walls of the head.
Material: Blend acetal resins. They do not absorb water. Low specific gravity 1,38-1,43 gr/cm3. Mechanically have crystallized structure at a rate ranging from 70-80%. This high crystallization attaches to these resins resistance 20 times greater than the acrylic and high mechanical impact resistance. In addition they have auto lubricant abilities.
The set is consist of two pulleys with ball bearing and an axis of 6mm thickness and 5,5cm length
Dimension of pulleys
Outer diameter 26mm
Inner diameter 20mm