... 3, Quick delivery 4, strict quality control Partname: multi cavity oil seal moulds 1. Mould for all kinds of ... rubber products as per customer's design.2. Cavity number: Single, multi-cavity3. Cavity/core steel: P20, 45#, Cr12MOV etc.4 ... in order to ensure moulding consistency and make the mould cavity surface to Ra0.4, the rest Ra0.8. ... and won a good reputation from them. multi cavity oil seal moulds