MANHOLES H 50 mm, PRE-GALVANISED 12/10
Gridiron pre-galvanised 12/10 manholes have two methods for lifting: by knob when the lids are only occasionally lifted, and with a handle when the manhole cover has to be removed more frequently.
JOLLY MANHOLE with knob
Recessed manhole cover: made of hot pre-galvanised sheet metal with a frame of thickness 15/10 and a knob with screw for lifting.