Box Top Parafilm M Dispensers feature easy application with no mess. To use, simply place the dispenser on top of the Parafilm M box and pull the sealing film through. There is no need to remove rolls from the packaging. The built in safety blade slides and cuts without danger to fingertips. Accommodates two 50 mm (2"), or one 100 mm (4") Parafilm M rolls. Supplied with two safety blades. Made from ABS plastic making the unit easy to clean.