... large stock Professional solution 1. Bearing structure: Usually including rod ends bearing and radial spherical plain bearing, always for a ball ... made of plastic, nylon, PTFE...etc;3. Bearing Type1): Rod ends bearing(ball joint) including GE,GEG,GK,GF,GIHO...series2 ... including PHS, POS, SI...T/K, SA...T/K, GIR...DO...series4. Surface treatment: Zinc-plated, Chromium-plated, Phosphate treated, Outer ...