1, Product name: acetylene bottles upright cart 

 2, Material: sus304 1.5T Stainless Steel Tube 

 3 parts: mining 8-inch rubber wheels 2 4 * 600mm long chain 2 

 4, the practical argument: the internal d = 310mm (applicable outside of the cylinder with a rubber ring) applies more broadly, to meet customer requirements acetylene bottle did not tilt, vertical discharge, did not fall.