This FEP-VMQ - MVQ - Silicone O-Ring has a diameter of 163x3 mm and is Red - Translucent in color. The hardness of this O-ring 163x3 - FEP-VMQ - MVQ - Silicone - FDA - Red - Translucent - ORS111776 is . Alternative names for the compound are FEP-VMQ / VMQ - FEP Encapsulated / FEP-Silicone / Silicone FEP Encapsulated, and it is commonly produced by Teflon® FEP | Neoflon® FEP | Dyneon® FEP. The O-Ring is typically used in and has an operating temperature range from ºC to 205 ºC. O-Rings 6520791 are referred to as 111776 and have a DIN 3771 size of 163x3. This item is equivalent to and has an FDA approval. The chemical name of this O-Ring is Methyl Vinyl Siliconenrubber / Vinyl Methyl Siloxaan.