This FEP-FKM - FPM - Viton O-Ring has a diameter of 310x6 mm and is Black - Translucent in color. The hardness of this O-Ring 310x6 - FEP-FKM - FPM - Viton - Shore A - FDA - ORS118839 is . Alternative names for the compound are FEP-VMQ / VMQ - FEP Encapsulated / FEP-Silicone / Silicone FEP Encapsulated, and it is commonly produced by Teflex FEP-O-SEAL®. The O-Ring is typically used in and has an operating temperature range from ºC to 205 ºC. O-Rings 6566102 are referred to as 118839 and have a DIN 3771 size of 310x6. This item is equivalent to and has an FDA approval. The chemical name of this O-Ring is Teflon® fluroropolymer - Silicone.