Plastic Roof Ice Guard Mini Snow Guard (100 Pack) Prevent Sliding Snow Ice Buildup-GREEN Stop snow from sliding off your roof. Prevent law suits and injuries Width: 1.5 Inches Length: 4 Inches Height: 2 Inches Please use a silicone sealant around the base of the guard in order to provide a water tight leak free seal. RFGD-100-Green-FBA Green Plastic Snow Guards