Peb sunda cov chaw tsim khoom muaj 20 xyoo kev hauv ntawv yas: Nylon daim ntawv, HDPE ntawv, UHMWPE ntawv, ABS daim ntawv. Yas pas: Nylon Qws, tus pas nrig HDPE, POM Qws, Pp Qws, Abs pas nrig, PTFE Qws. Lub raj yas tshuab: cov raj siv hlua nylon, raj raj, pp raj thiab tshwj xeeb cov ntu.