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4.5 inch Lag Screw, Washer and Shield for Speed Bump or Hump Quantity in Basket: None Item: CONCRETESCREWSPEEDBUMP Price: $3.50 Shipping Weight: 1.00 pounds Quantity: 4.5 inch Lag screw, washer and shield for speed bump or speed hump concrete installation. For best results on speed bumps and speed humps, use 10 ounces of PL Premium Polyurethane Construction Adhesive with hardware. Epoxy can be bought at your local hardware store. Sold individually. Only sold with speed bump or speed hump product order.