Crawler Innovations Cell Block Crawler Stand is a 4" machined foam cube designed to support the weight of a RC Crawler at the chassis and not on the Tires & Foams. Supporting your chassis at the skid plate keeps the weight off your tires during storage, and dramatically increases the useable life of the tires and foam inserts by eliminating the chance of developing flat spots. Works perfect with 1.9 and 2.2 class crawlers.