1,Type:Circular,square,elliptic manhole covers,sanitary manhole cover,sanitary grade manhole cover sanitary Circular type manhole cover(stainless steel manhole,man way) 1,Type:Circular ... polished or dull polished Ra<0.8um manhole covers,sanitary manhole cover,sanitary grade manhole cover NameSanitary manhole coverNo.SHSD-MC03MaterialAISI304,AISI316LTypeCircular,square,ellipiticFinenessInner surface ...