Used to seal the joint of HDPE (WaterKIT) flanged ends with PN10-16 flanges. Material: EPDM, Shore hardness 70 ±5 IRHD. Reference standard: SR EN 681-1 Rubber sealing gaskets. Material requirements for sealing gaskets for pipe joints used in the water supply and sewerage sector. Part 1: Vulcanized rubber. Explanation of terms in the name: D = outside diameter of the flanged end with which the flange is compatible; DN = nominal diameter of the flange according to SR EN 1092-1, SR EN ISO 6708.