OTC (2422 13" Extended Reach Blow Gun When inlet pressure is 90 PSI, venting design prevents pressure exceeding 30 PSI if tip becomes blocked When inlet pressure is 100 PSI, the noise level is held below 80 dB conforming to OSHA Standard 1910-95 b, quieter than an electric drill Stainless steel 13 inch nozzle and variable speed trigger for extended reach and full control of amount of air dispensed Impact and Weather resistant materials and drop resistant construction Brass threaded air inlet