... weldable type king pin5) detailed specification shown on PCMK website2" Fifth Wheel Model PM-QD50-173(6)1) mounting height: 173mm2 ... manufacturer of semi trailers and trailer parts, such as 1) fifth wheels (2" and 3.5"), 2) king pins (2" and 3 ... ) other components like twist container locks, screw locks, brake chamber, wheels, tyres, and other functional components are also available Ningbo Pacemaker ...