Large QUIKcaps are specially sized to fit computer keyboards, an often overlooked site for potential cross-contamination. Elasticized edge envelops all exposed keyboard surfaces completely to protect from airborne contaminants, disinfectants and dust. Will not interfere with any cable arrangements. Thin transparent plastic keeps keys in plain view and fully functional. Large enough to cover B-size set-up trays too. Stretches up to 14 1/2" diameter - over 45% more coverage than regular QUIKcaps. 400 per pack.