... ,Square,Round,Pressure Stainless steel manhole1.Material:AISI304,AISI316,AISI316L2.Type:Elliptical,Round,Square,Pressure3.Dimensions:300mm-600mm4.Height:65mm-150mm5 ... :Mirror polish,Mechanical polish,Electrical polish9.Handle species:Spanner type handle,Plastic or Stainless steel hand wheel type handle10.Open mode:Inward or outward ...