... are NAK80, P20, 4140, S50C 4. We have 15years experience in making rubber moulds, especially for rubber molds of electronic rubber ... parts, automotive rubber parts, toy tires, we are a leading rubber mould maker in China. 5. We have our own rubber products ... -2weeks, complicated rubber molds like cold runner injection rubber molds in 30days. 9. WSR can help customer to run mass production ...