The pulleys are sutable for stringing Six bundled conductor lines Six sheave are made of aluminium alloy, mounted on the ball bearings and cover with neoprene rubber ring The Centre sheave is made of MS, mounted on the ball bearings. Technical Specification: The frame are made of Mild Steel For 800mm : Sheave dimension( Outside diameter x root diameter x sheave width ) 800 x 688 x 120 mm for 660mm : Sheave dimension( Outside diameter x root diameter x sheave width ) 660 x 543 x 120 mm