Block Bottom Valve Sack Bags are export quality bags, which are largely demanded in the construction sector for packaging cement through both automated and manual filling. These bags are light in weight but can carry heavy weight. Their heavy weight bearing ability and high tensile strength makes them suitable also for packaging food grains, textiles, fertilizers and many other products. We have Block Bottom Valve Sack Bags available in standard sizes to suffice wants of different buyers wanting different sizes of bags.