Only 8 left!
Polylok has combined all the best features of concrete and plastic risers to create the patented riser system. The risers hold their shape, are stackable, screw together, and are water and airtight. Structural ribs inside prevent frost from adhering to the riser in frost prone areas.
Polylok part number: 3009-NG (20" x 6" Risers) (Replaces retired part number 3009)