SAM C1-R45 circular non-folding safety grate suits 550 to 650 mm manhole (with 45 mm nylon roller)SAM C1 R45 circular non folding safety grate suits 550 to 650 mm manhole (with 45 mm nylon roller) Temporary maintenance safety grate Circular non folding with 45 mm nylon roller Powder coated black with non slip finish Fits in a 550 to 650 mm manhole 200 kg WLL Note: annual inspections required by the manufacturer or an approved agent or reseller 5 year life design from date of purchase