Thermosetting Polyimide, Thermoplastic Polyimide, Pbi Powder manufacturer / supplier in China, offering Sp-1 Ball Pin, Withstands Long-Term High Temperatures Above 300° C, Insulating, and a Replacement for Vespel Sp1., Polyimide Pin Grap, Withstands Long-Term High Temperatures Above 300° C, Wear-Resistant, and a Replacement for Vespel Sp-21., Polyimide Discpad, Withstands Long-Term High Temperatures Above 300° C, Wear-Resistant, and a Replacement for Vespel Sp-21. and so on.