Expandable Barrier 1. Folding and Expanding 2. Wheels possibly in the bottom 3. Bolt on the flank 4. Original Patent Product: Expandable BarrierBrand: MAXPANDModel: B3AMaterial: Steel, Aluminum, Aluminum alloy, etc.Color: Red, White, Yellow, Black, etc.Surface: Plastic-spraying by environment-friendly outdoor powderFold Length: 50cmExpand Length: 500cmHeight: 95cmWeight: 8-11kgs depends on the ...