Donut Risers (24-in ID) Category:Risers Use:Commercial, Municipal, Sanitary, Stormwater Class:H-20 Type:Concrete Interior Dimensions:24" Diameter Exterior Dimensions:40" Diameter Datasheets Donut Risers (24-in ID)
Polylok Riser 20"x12" Category:Risers Use:Residential, Riser Type:Plastic Size:12" Weight:0.5 lbs Interior Dimensions:20"x12" Datasheets