... are NAK80, P20, 4140, S50C4. We have 15years experience in making rubber moulds, especially for rubber molds of electronic rubber ... 2weeks, complicated rubber molds like cold runner injection rubber molds in 30days.9. WSR can help customer to run mass ... some special molds, can be in 30days, especially for some automotive rubber moldsSmall orders are welcomed Bone shaped silicone rubber wirding thread ...