Available in a variety of sizes, our rectangular and square PRO-RING inlet risers are INDOT-approved, durable, and lightweight. They're made of expanded polypropylene, which is high strength and 1/20th the weight of typical concrete grade rings. This makes them easier to install, less prone to damage during transportation, and able to absorb shock/energy better than rubber shims.
PRO-RINGs meet AASHTO HS-25 load requirements. They are not damaged/compromised if in direct contact with 285 degree hot mix asphalt. They allow for adjustments to within 1/4" of desired elevation; there are also no stacking height limitations.
Standard dimensions are 24" x 24" I.D. or 24" x 36" I.D. It's advised to use M-1 Adhesive to seal the PRO-RING for best results.
We are TYPICALLY able to provide same-day pickup for the sizes highlighted above. Call ahead to confirm availability.
PRO-RING Inlet Riser/Shim
We can provide 24" x 24" flat squares, 24" x 24" angle squares, 30" x 30" flat squares, 30" x 30" angle squares, 20" x 24" flat rectangles, 20" x 24" angle rectangles, 24" x 30" flat rectangles, 24" x 30" angle rectangles, 24" x 36" flat rectangles, 24" x 36" angle rectangles, 30" x 46" flat rectangles, and 30" x 46" angle rectangles.
We can provide any of these sizes in 3/4", 1", 1-1/4", 1-1/2", 2", 3", or 4" (excluding the 30" x 46", only available in 1", 1-1/2", and 2") heights or 1" to 2" in the sloped grade.