rtp level 303RTP 303 by RTP Company is a polycarbonate (PC) grade reinforced with 20% glass fiber. It exhibits good creep resistance, toughness, dimensional stability and low fatue endurance. ItRTP 303 by RTP Company is a polycarbonate (PC) grade reinforced with 20% glass fiber. It exhibits good creep resistance, toughness, dimensional stability and low fatue endurance. It