1.ball dia: 50mm,1-7/8", 2", 2-5/16", 2. ... , polished, etc 3.marking: customer decide hitch ball BALL DIA50mm, 1-7/8", 2", 2-5/16"SHANK DIA3/4", 1", 1-1/4 ... "SHANK LENGTH1-1/4", 2-1/8", 2 ... us your details, including pictures, spec., drawings, etc. ISO standard hitch ball