Tamrac MX5384, MAS Medium Accessory Belt Pouch with Quick Attach System, Black. A fast access foam padded hook and loop closing pocket sized for flashes Like Canon's 550EX and Nikon's SB-28, light meters and other accessories Quick attachment to any belt or the Modular Accessories System The Modular Accessory System (M.A.S.) offers additional accessories that quickly attach to any belt Provide a fast and secure method for customizing many of our backpacks, hip packs, shoulder bags