Urinal Cakes, 4 oz. Urinal Block/Screen Combo URINAL BLOCK, NON-PARA, CHERRY 12/CS Become a member of our supply community and you'll be notified of new products, labor-saving innovations, and special promotions tailored specifically for the U.S. Navy at SUPPLYTHENAVY.COM. Just call 1-888-622-0356 or click Get on the List!