Model 500 WHATCOM MANUFACTURING'S extra heavy-duty machine engineered and designed for use with sand!! Load up to 10 yards of sand and blow directly into dairy stalls. Our PTO hydraulic system uses variable speed controls to vary the amount of sand discharged and also the belt speed for distance of throw. The high speed drive cleated belt pours sand to front of stall with no HAND LABOR required!!!! Heavy Wall square tube frame and tongue with 3/16" thick floor make for a very rigid machine. Next >>