... resistant. 2. OEM is welcomed. 3. Anti-toxic rubber seals for glass. 4. Qualified supplier of some famous brands. We are professional ... , medical seal, etc. Description of Solvent Resistant FLS Rubber Seals For Glass: 1. Materials: FLS, also can be NR, HNBR, Buna, FVMQ ... is ± 5 shore A, and can be ±3 shore A for special products. 4. Size tolerance: exactly upon your request or ...