Bon 13-440 Stucco Sprayer - 4 Nozzle Used for spraying grouts, stucco, plaster, concrete and other industrial coatings Choice of nozzles provides various spray sizes and finishes The range is from 1/8" heavy texture to 1" thick in structural layers Use with a 5 HP or larger air compressor The bigger the tank/more air, the better the unit will operate