API 650 Roof Manway Gasket 20"
Nominal Roof Manhole Size: 20"
Standard Dimensions: 26" OD x 20" ID - (16) 3/4" BH on 23-1/2" BC
Nominal Roof Manhole Size: 20"
Standard Dimensions: 26" OD x 20" ID - (16) 3/4" BH on 23-1/2" BC