![](https://poleas.mx/37-large_default/aluminum-variable-speed-1-slot-3-4.jpg)
4 and 5 "variable speed pulley made of AlSi12Cu aluminum (Fe).
Variable speed pulley made of AlSi12Cu aluminum (Fe).
External diameter 3 and 4 ". Special for varying speed. The internal diameter is pilot hole or 5/8 with 3/16 wedge and 5/16 oppressor.