... Metal 2, OEM orders 3, Quick delivery 4, strict quality control O-ring mould for rubber seals:1. Mould for all ... Single, multi-cavity3. Cavity/core steel: P20, 45#, Cr12MOV etc.4. Products Material: NBR, FPM, CR, EPDM, ACM etc5. Standard ... consistency and make the mould cavity surface to Ra0.4, the rest Ra0.8. We have been serviced ... and won a good reputation from them. O-ring mould for rubber seals