... CR FKM etc 2.Usage:sealing parts 3.Certificate:ISO 9001,RoHS. Rubber box mail sealFeatures:1. Rubber box mail seal are solid ... , NR, SBR, EPDM, FKM, IIR, BR etc.. Performance for rubber box mail seal:Durable in liquid material, mineral oil and lubricantGood ... temperatureLow penetrability of gasWithout harm to human bodyWith RoHS approval. box mail seal