... the sleeve. The "O" ring or “X” ring will greatly reduce the wearing and ... , 630V, 630VM,428V-X,428VM-X,520V-X,525V-X,530V-X,530VM-X,630V-X,630VM-X,420HZ,428HZ,520NZ,525HZ, ... 530HZ,630HT3.Color:self,gold,nickel,blue,red,orange,green,yellow,pink ... etc. 4.Certificate of Quality: ISO 9001:2000,SGS 5.The grease is made in USA.6.O-ring and X ...