... round,elliptical,square 4) TL: arc manhole cover, which can sustain a Max: static ... °C )5) TL-l: arc manhole cover, with high bracket, used big vessels ... 6) TL: flat manhole cover, with low bracket.7) TL: flat manhole cover ,with high bracket, ... Material : 304 , 316LNameStainless Steel Sanitary Tank Manhole coverNo.SHSD-MC01Material304,306LSize410x510mm,320x440mm,350x450mmConnectionNoPressure Height75,100 ...