... sizes:12mm, 16mm,20mm, 5/8'' or3/4'' 2, for high temperature rubber 3, ISO9001 WenZhou RiMi ... Which used in family water pumps, industrial pumps, auto cooling-pumps and compressors. The products sell abroad ... ,17mm, 20mm, 1/2'', 5/8'', 3/4''3, sturdy coil spring4, sintered steel, alumina ceramic,graphite ... , small diameter rotary shaft applications. Auto unitized seal for engine coolant pumps type 6A