The Russell Chest Seal? is one of the largest chest seals currently available.Key Features Fast, easy and intuitive to apply Patented hydrogel base 'Sticks and Stays Stuck!' 4 large peripheral apertures allow drainage of air and blood Large central hole in base material allows quick accurate placement with reduced risk of obstructing the wound opening Low profile and highly flexible Compact: easy to pack into medical kitSpecifications Dimensions20.00cm x 15.00cm Pack Dimensions14.00cm x 13.00cm