Allegro 9510-50 8" X 20" Polyester Vinyl Manhole Ventilation Passthru (1/EA) Mops & Handles *Pre-laundered and pre-shrunk for a

*Pre-laundered and pre-shrunk for a long product life *Envelope backing style

and a range of magnifier options

and uniformly * Easy grip handle * NSF

calibration cap

North Organic Vapor & Acid Gas cartridges are available for 5400

Allegro 9510-50 8" X 20" Polyester Vinyl Manhole Ventilation Passthru (1/EA) Mops & Handles *Pre-laundered and pre-shrunk for aAllegro's MVP is the first manhole system that combines the low profile manhole air vent, 90 elbow and built in mounting all in one unit. This unit comes with a collapsible duct, for easy entry, stored in a small storage bag that can be dropped down into the manhole with a quick release of the drawstring. The Collapsible duct springs back into shape once worker is down into the manhole. The ducting is vinyl and polyester with PVC coating and heat