Allegro 9401-12 Manhole Shield - Each

Constructed of rugged, lightweight Polyethylene with bright yellow material that resists fading. Will fit 28 in (71.1 cm), 30 in (76.2 cm), and 32 in (81.2 cm) diameter manholes with an inflatable seal that ensures a watertight seal. Designed with 4-outrigger support gussets that stabilize the shield and are 12 in (30.4 cm) tall to keep water and mud out of manhole as you work. Can be used with Allegro guard rail and shield retainers.