Adorama Slinger Filter Pouch "A" Holds Three 58mm Round or Three "A" Series Square Filters, Black. Made of High Quality Softex Material. Padded to Protect Your Valuable Equipment. Two Ways to Carry: Attaches to Slinger Bags with the Universal Strap Attachment (U.S.A.) System. Attach the Pouch to Your Belt with the Hook & Loop Straps.