STM Ace Cargo Carrying Case STM-117-193M-01, Black, 600D fabric, 1680D poly fabric, Screen Size 35.6 cm (14"), Water-resistant, Removable shoulder strap, top carrying handles, Includes Shoulder strap, Highly protective design suspends. 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.