Hi-Pro – next generation MAPP? and MAP//Pro? replacement gas cylinder for the professional. 400 g of propylene gas. Conforms to EN12205 Hi-Pro gas cylinder for the professional. 400 g of Propylene gas. Clean propylene to give a hotter flame to do jobs faster or to tackle those more difficult jobs. All in a cylinder ideal for the Bullfinch FirePower torch No.1660 and similar torches taking the CGA 600 connection – see below. Gives high performance of gas in the coldest of weathers. Gas valve has CGA 600 connection – 1in x 20 UNEF These cylinders conform to European Standard EN12205 as they have to by law. The requirements of this standard is that the cylinders have a valve which prevents dangerous refilling, and meets other safety requirements. Cylinder dimensions – approx 270mm tall x 75mm dia.