u cup seal 1. OEM/ODM welcomed. 2. Can meet ROHS,REACH, ... . Small order is welcomed. 4. Competitive price. Details of u cup seal: 1. Materials: comply to ROHS, NBR, Silicone (VMQ), EPDM ... shore A, tolerance can be ±5 shore A, for some special products, we can reach ±3 shore A tolerance. 3. Tolerance ... you develop the design based on your idea. Rubber U Cup Seal