This CR - Neoprene O-Ring has a diameter of  mm and is Black in color. The hardness of this O-ring - 142x4 - CR - Neoprene - 70 Shore A - Black - ORS205302 is 70 Shore A. Alternative names for the compound are , and it is commonly produced by . The O-Ring is typically used in and has an operating temperature range from -40 ºC to 100 ºC. O-Rings 312390 are referred to as 205302 and have a DIN 3771 size of . This item is equivalent to and has an approval. The chemical name of this O-Ring is Chloroprene rubber / chlorobutadiene rubber.