Berry Plastics™ 621322 Steel-Flex® LLDPE Can Liner, Black, 22.5" x 25.5", 500-CtTough as Nails. The name says it all. Steel Flex liners pack more performance into every bag, providing up to 50% greater puncture and tear resistance than other low density liners. That means a lower gauge Steel Flex bag will perform as well as, or better than, the more costly, higher gauge bag you may be using now. Made with our best proprietary blend of Linear Low Density Polyethylene (LLDPE), these liners work well in a variety of applications,