This CR - Neoprene O-Ring has a diameter of 634 x 7 mm and is Black in color. The hardness of this O-ring 634x7 - CR - Neoprene - 70 Shore A - Black - ORS175688 is 70 Shore A. Alternative names for the compound are Neoprene, and it is commonly produced by Neoprene. The O-Ring is typically used in and has an operating temperature range from -40 ºC to 100 ºC. O-Rings 459102 are referred to as 175688 and have a DIN 3771 size of 634 x 7. This item is equivalent to and has an None approval. The chemical name of this O-Ring is Chloroprene rubber / chlorobutadiene rubber.