High pressure injection molded polypropylene - medium gray colors, butyl mastic on the top and bottom guarantees no slipping All sizes of heat pump risers can handle a uniform load of 2000 pounds with no failure when installed under the unit in an array of at least four heat pump risers All sizes of heat pump risers can handle a point load, applied to one square inch area in the center of the footpad recess on the top of the HPR, of less than 800 pounds with no failure

PROP65: Cancer and Reproductive Harm - For more information go to www.P65Warnings.ca.gov