Choyimira chachikulu cha caster chimapangidwa ndi chitsulo, ndipo gudumu lapakati limapangidwa ndi polypropylene (PP) yokhala ndi mphamvu zonyamula.
TPR imagwiritsidwa ntchito ngati gudumu pamwamba pa zinthu, zomwe zimakhala ndi kukana kwambiri kwamafuta, kukana madzi, kukana mankhwala ndi kukana nkhungu, komanso kumakhala ndi mayamwidwe abwino komanso kuchepetsa phokoso.
Kunja kwa gudumu kumapangidwa ndi zinthu za ABS, zomwe zimadana ndi dzimbiri komanso zosavala.Kuphatikiza kwa chimbale cha mpira wozungulira padziko lonse lapansi ndi mipira imakhala ndi katundu wambiri komanso mphamvu yonyamula.