6" Rectangular Riser Category:Risers Use:Residential Class:Pedestrian Type:Concrete Interior Dimensions:~19"x15" Exterior Dimensions:23"x19" Datasheets Rectangular Risers
Round Riser Cover Category:Risers Use:Residential, Sanitary Class:Pedestrian Type:Concrete Weight:138 lbs Exterior Dimensions:30" Dia. Datasheets Round Risers
18" Round Riser Category:Risers Use:Residential, Sanitary Class:Pedestrian Type:Concrete, Septic Tank Weight:337 lbs Interior Dimensions:~25" Dia. Exterior Dimensions:30" Dia. Datasheets Round Risers
12" Lift Station (LS) Riser Category:Risers Weight:325 lbs Interior Dimensions:~26.5" x 26.5" x 12" Exterior Dimensions:32" x 32" x 12" Datasheets Lift Station Risers
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)