High Barrier Coffee Bags Pouches w/ Valve 4oz (25,Glossy Black) Premium coffee bags - layered PET / AL / LLDPE Heavy duty 5.0 mil thick with resealable ziptop 5.125 inches wide x 8.125 inch tall with 3.125 inch gusset One way valve for freshness and burst resistance 25 glossy black 4oz pouches