450mm clear opening recessed manhole cover & frame. Manufactured from polypropylene and load tested to 3.5 tonnes. Cover is locked to the frame by 2 fixing screws. Fill recessed cover with desired finish (gravel, bark, grass, plants, etc). Overall dimensions: 550mm diameter x 150mm deep. When installed, has an effective depth of 30mm. Designed for use with WUCC3, WUCC5, WUCR2 & WUCR3.