This roller kit will make it possible to transform any wooden arbalete into a mono roller, all the details are made of sturdy stainless steel. The kit is modular and customizable, and can optionally be equipped with the economical and reliable Sliding Pulleys with white polymer core, Iron single bearing, Double bearing Ceramic (groove 22 x 30 in diameter), and Iron double bearing. 
Transformer base mono roller kit is composed of:  

• 1 pair of Transformer ceramic pulleys (diam.28, groove 20, width 16 mm) on request with a width of 14 mm; 
• 1 axis of 6 x 54 mm; 
• 1 pair of mono Transformer stopper; 
• 1 simple bank Transformer; 
• 1 bank with Transformer support; 
• 1 pretension hook; 
• 1 Transformer wire feeder. 

Kit roller mono transformer configuration: pulleys with 1 Ceramic  bearing 6 x 15 x 5 or normal Sliding pulley