... ,273,323,407mm in diamater. 2, angle, ball joint and inlet flange is optional 3,Siemens motor 1, 168,219,273,323 ... ,407mm in diamater. 2, angle, ball joint and inlet flange is optional 3, selection of gear ratios A) High quality ... and low noise.B) outside tube complete with one inlet, one outlet, end flange, ball joint , inspection window.C) standard fitting parts ...