Sisi ni mtengenezaji wa kitaalam na muuzaji wa bomba la chuma au zilizopo, pamoja na safu kamili ya vifaa vinavyohusiana kama vile vifuniko vya mabati, vifuniko vya mabati na vifaa vya mabati (buttweld, kughushi, vifaa vya compression).
Kiwango:ASTM A53, ASTM A106, EN10255, EN10219, EN10210, EN39, BS1387, ASTM A500, ASTM A36, API 5L, ISO 65, JIS G3444, JIS3452, DIN 3444, DIN2440, ANSI.
Darasa:A53, A106 Gr.A, Gr.B, Gr.C, S235, S275, S355, A36, SS400, Q195, Q235, Q345