American Highway Products has been manufacturing the highest quality adjusting rings Since 1978. The "Pivoted Turnbuckle Manhole Riser", patented valve box risers and catch basin risers all start at ¾” and go up in ¼” increments. The MSR eliminates patching around manholes by using a solid rubber ramp. Come by our booth and check out all our products.
                        
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                                        - Pavement Repair/Equipment