Valox 553 Polycarbonate/Polybutylene Terephthalate (PC/PBT) resin is a 30% glass fiber reinforced, reduced shrinkage, injection moldable grade. This brominated flame retardant PC/PBT has a UL V0. Valox 553 resin is a general purpose resin that is an excellent candidate for a wide variety of applications including appliance handles, electrical motors, pump housings, and spotlights.