... works as a part of the whole set of sealing parts. O-Ring is good at both in static seal and ... , EPDM, SILICONE, VITONE, etc. Can choose on your requirement; 2. Many types of oil seal: TC, TB, TA, SC, SB, SA, VC ... , DC, DB etc, also can make on your demand; 3. Many types of O-Ring : O-type, E-type, U-type, V ...