pully 1, size:70*22.5*22.5mm 2,double wheel, wheel size is dia20*8mm 3,metal galvanized pullywe can offer the plastic or steel pulley.1)material: plastic, steel.2) Art of surface: zinc/nickel/chrome ating, hot galvanized, painting.We available to made strictly to customer drawings in close tolerances and free of swarf or deformities.