Agbanwewo ụlọ ọrụ mbupụ na ngwa ngwa site na eriri polyester, nke siri ike, na-adịte aka, ma na-eri ihe na-erughị ọkọlọtọ ọkọlọtọ na nhọrọ polypropylene. Ihe nkwakọ ngwaahịa ndị a na-eme enyi na enyi, nke a na-akpọkwa PET plastic steel packing belts, nwere nnukwu ike ike na obere ala.