1.Mzere wa mphira wa arched
2.Special-woboola pakati pa anti-back pressure rubber strip
3.Air permeable siponji mphira
4.Solid/square rabber strip (ya makatoni)
5.Columnar gap rabber strip (yomwe tidakonzera makatoni a malata)
6. Mzere wachitetezo cha corrugated