2" x 4" steel tubing with 1/2" mounting plate has all mounting bolts welded to the frame for easy service

Half and full face style respirators require a minimum of 4 cfm each

Stator coil/magnets are a low maintenance system that provides solenoid control voltage

354 diameter per hole

Does Not Include Adjustable Pressure Unloader Or Injector

Allegro - 8" Two Speed Centrifugal Blower System with 8" MVP (9507 Blower) 42.0 GPM 2" x 4" steel tubingAir Powered Fans & Blowers for Confined SpacesAllegro's Complete Ventilation Systems include all the most asked for equipment you need for your confined space site. The systems include a choice of Allegro's most popular blowers, six feet and fifteen feet of ducting with a storage bag and a Manhole Ventilation Passthru (MVP). The Centrifugal Blower Systems offer lightweight portability with the highest output available. See individual blower