Imiterere yihariye niyi ikurikira:6.8 diameter yo hanze: Teflon yimbere imbere + urwego rwicyuma, nta ruhu rwa PU.7.5 diameter yo hanze: Teflon imbere yimbere + urwego rwicyuma + urwego rwuruhu rwa PU, kandi ubunini burimo uruhu.10.5 diameter yo hanze: Teflon imbere yimbere + ibice bitatu byinsinga zicyuma + urwego rumwe rwuruhu rwa PU, kandi ubunini burimo uruhu