foam rubber o-rings for SLA batteries 1:Material:EPDM 2.Any color are chosen 3.OEM are welcome 4.Best price with good foam rubber o-rings for SLA batteries 1)The raw materials are imported from Japan,Europe,America to assure good quality of products 2)made on anti-acid,explosion,water loss and consistency, prolonged the battery life.3)Accurate opening pressure and closing pressure can be done ...