Expandable Crowd Control Barrier Folding and Expanding Wheels possibly in the bottom Bolt on the flank Origin Patent Product: Expandable Crowd Control BarrierBrand: MAXPANDModel: B2SMaterial: Steel, Aluminum, Aluminum alloy, etc.Color: Red, White, Yellow, Black, etc.Surface: Plastic-spraying by environment-friendly outdoor powderFold Length: 15cmExpand Length: 220cmHeight: 105cmWeight: 4-7kgs ...