British Type Oiri Inotonhorera inogadzirwa nemhando yealuminium uye chitarisiko chiri mushure mekupedza anodized.Mitsara yakasiyana inosanganisira: 7-mutsara 10-mutsara, 15-mutsara, 19-mutsara.30-mutsara.Iyi inotonhorera yemafuta inoratidzira mune isingaremi, iri nyore kuisa.Shandisa kutonhora pasi injini mafuta, kutapurirana uye kumashure-kusiyana.Inochengeta tembiricha yemafuta yakadzikira kudzivirira kukuvara kweinjini uye kuwedzera hupenyu hweinjini.