Extra Strong - Guaranteed not to Break - Full Replacement Warranty. The use of a Shredder waste sack or bag with a shredder means that the dust is collected within a sealed unit cannot escape. The use of an internal waste sack makes emptying much easier even with a full collection box. Anyone who has tried to empty a collection box directly into a skip in the car park or rubbish bin as the wind gets hold of it will only do it once! The use of a plastic bag will eliminate the possibility of shreds blowing down the street and generally causing untidy mess. Dimensions: 455x865x1080. Thickness: 20 microns. These bags offer reliable document security while being fully recyclable which not only protect your sensitive information but also contribute to a greener planet - They are to be recycled in the plastic waste - normally as LDPE 4.These sacks will fit all Shredders that have a Shredder Sack type of "S2" in the specification chart.