I-bumper iyithuluzi lokuphepha elimunca futhi linciphise umthelela wangaphandle futhi livikele ingaphambili nangemuva komzimba wemoto. Eminyakeni engamashumi amabili edlule, ama-bumper angaphambili nangemuva ezimoto ayenziwe kakhulu ngezinto zensimbi. Anyatheliswa ensimbini yesiteshi enobunjwa obungu-U enobukhulu obungaphezu kuka-3 mm, kanti ubuso baphathwa nge-chromium. Ayeboshwe noma ahlanganiswe ndawonye ngomshayo omude wohlaka, futhi kwakukhona igebe elikhulu nomzimba, njengokungathi yingxenye enamathiselwe. Ngokuthuthuka kwemboni yezimoto, i-bumper yezimoto njengethuluzi lokuphepha elibalulekile nayo isendleleni yokusungula izinto ezintsha. Ama-bumper angaphambili nangemuva ezimoto zanamuhla ngaphezu kokugcina umsebenzi wokuvikela wokuqala, kodwa futhi nokuphishekela ukuvumelana nobunye nesimo somzimba, ukuphishekela ukukhanya kwawo. Ukuze kufezwe le njongo, ama-bumper angaphambili nangemuva ezimoto enziwe ngepulasitiki, aziwa ngokuthi ama-bumper epulasitiki. I-bumper yepulasitiki yakhiwe izingxenye ezintathu: ipuleti langaphandle, izinto zokubopha kanye nomshayo. Ipuleti langaphandle kanye nezinto ze-buffer zenziwe ngepulasitiki, kanti ugongolo lwenziwe ngeshidi eligoqwe ngokubandayo elinobukhulu obungu-1.5 mm futhi lwakhiwe lwaba umsele omise okwe-U; Ipuleti langaphandle nezinto zokusika zinamathele kugongolo, olunamathele kuzikulufu zesitimela sohlaka futhi lungasuswa nganoma yisiphi isikhathi. Le bumper yepulasitiki isebenzisa ipulasitiki, ngokuyisisekelo isebenzisa izinhlobo ezimbili zezinto zokwakha, i-polyester ne-polypropylene, kusetshenziswa indlela yokubumba ngomjovo. Kukhona nohlobo lwepulasitiki olubizwa ngokuthi uchungechunge lwe-polycarbon ester phesheya, ukungena ekwakhiweni kwe-alloy, indlela yokubumba ngomjovo we-alloy, ukucubungula ngaphandle kwe-bumper akugcini nje ngokuba nokuqina okuphezulu, kodwa futhi kunenzuzo yokushisela, futhi ukusebenza kokumboza kuhle, inani lokuningi emotweni. I-bumper yepulasitiki inamandla, ukuqina kanye nokuhlobisa, ngokombono wokuphepha, ingozi yokushayisana kwemoto ingadlala indima ye-buffer, ivikele umzimba wemoto wangaphambili nowangemuva, kusukela ekubukekeni kombono, ingahlanganiswa ngokwemvelo nomzimba entweni, iyonke, inomhlobiso omuhle, ibe yingxenye ebalulekile yokuhlobisa ukubukeka kwemoto.
