... ), bottles, containers, housings, light covers, reflectors, safety helmets and shields Polyester - Thermoplastic PBT, PET Celanex, Crastin, Lupox, Rynite, Valox Rigid, heat ... , mold base. The cost of machining the cavities is affected by nearly every aspect of the part's geometry. The primary cost driver is the size of the cavity that must ...