ʻO ka bumper kahi mea palekana e hoʻopau ai i nā mea e hoʻopili ai a ho'ēmi i ka hopena o waho a pale i ka mua a me ke kua o ke kino o ke kaʻa. Iwakālua makahiki i hala aku nei,ʻo ka mua o mua a me ka hope o nā kaʻa o nā kaʻa i hana nuiʻia i nā kumu metala. Ua hoʻopaʻaʻia lākou i loko o nā kila kila u-shoped channel me kahi mānoanoa o nā meaʻoi aku ma mua o 3 mm, a ua mālamaʻia ka maka me ka chromium. Ua holo ihola lākou a kālaiʻia me ka pā kiʻekiʻe o ka hoʻonohonoho, a he pā nui me ke kino,ʻo ia hoʻi he mahele kokoke. Me ka hoʻolālāʻana o kaʻoihana kaʻa,ʻo ka pahu kaʻa kaʻa e like me ka mea palekana palekana eʻoi aku ma ke ala o ka hana hou. ʻO ke kaʻa kaʻa o kēia lā a me nā pahu hope i ka hoʻohuiʻana i ka hana pale mua, akāʻo kaʻimiʻana i keʻano o ke kino. No ka hoʻokōʻana i kēia kumu,ʻo ka mua o nā kaʻa a me ka hope o nā kaʻa i hanaʻia i ka plastics, iʻikeʻia e like me nā bumpers plastic. ʻO ka bumper plastic e hoʻopiliʻia anaʻekolu mau'āpana: ka papa o waho, keʻano cushioning a me ka beam. ʻO ka pā Outer a me nā mea nui i hanaʻia i ka pākeke, a hanaʻia ka beam o ke anuanu e pili ana i kahi mānoanoa a i hanaʻia i loko o kahi pākaukau. Hoʻopiliʻia ka pākuhi waho a me nā mea cushioning i ka beam, e hoʻopiliʻia ana i nā screws rail a hiki ke laweʻia i kēlā me kēia manawa. Hoʻohanaʻo ia i kēia pāpū plastics plastics, basically me ka hoʻohanaʻana iʻelua mauʻanoʻano, polyester a me Polyprotlene. Aia nō kahiʻano o ka lole i kapaʻiaʻo Poycoronard heʻe maka'ā, lawehalaʻia i ka poniʻiaʻana, a me ka uku o ka pahū. ʻO ka ikaika o ka bumper bumper, ka ikaika a me ka hoʻonaniʻana, mai ke kino o keʻano, hiki ke pāʻani i ke kino o keʻano o keʻano o ke kaʻa.
