Anneled Copper tubes : 6~22mm， s ≦ 1.5mm The OB/85S hydraulic pipe bender is the smallest in its range of machines and also the easiest to handle. At the same time, it is very powerful and is able to bend big diameter pipes with the minimum effort. Technical features : - Aluminum dis-casted and stainless teel body pump with double hydraulic circuit - High working range thanks to very long piston stroke - Adjustable pump lever according to hand size