... CR,PDFE,EPDM,SILICONE,VITONE, etc.can shoose on your requirement; 2.Many types of oil ... KC,KB,KA,DC,DB etc,also can make on your demand; 3.Mnay types of O- ... E-type,U-type,V-type and so on,can make on your type. 4.Defferent sizes of oil ... seal,also can make on your size. 5.Optional colour for you ... ,yellow,brown,white,green,violet etc,can make it on your order; 6.Your OEM order of ...