Muaj ntau qhov ntau thiab tsawggalvanized ntsia hlau pawg. Rau N hom ntsia hlau, cov yeeb nkab diameters yog 60/68/76/89/114mm. Cov no yog txhua qhov ntau thiab tsawg. Qhov loj tshaj plaws peb tuaj yeem ua tau yog 325mm txoj kab uas hla. N hom kauv piles yog dav siv, xws li chij ncej, khaub ncaws kab, laj kab, hnub ci vaj huam sib luag mounting, thiab lwm yam. Nws muaj nuj nqi yog heev yooj yim thiab yooj yim rau nruab.
