STM Ace Carrying Case for 35.6 cm (14") Notebook - Black Protect your schools investment with the ace. Designed with direct feedback from educators and district level IT professionals, we have built the ultimate protective bag for the K-12 classroom environment. Designed to fit any 13 inch form factors including MacBook Air, MacBook, MacBook Pro and Chromebooks. The ace exceeds U.S. Department of Defense Standard 810F/G drop testing protocols.