Sound box rear cover Material: SMC Mian character:light weight, high strength, weather resisted and easy molding sound box rear cover, cover, base Mould base :S50c,s55c/customizedMould caviry&core:P20,45c/customizedMould life guarantee150,000 shotsMachine:CNC milling machineEDM/W.C./NC Drilling MachineEngraving Machine3-D laser scanner2000T, 315T Hydraulic MachinePort of loadingNing bo ...