Make-A-Berm™ heavy duty allows for spill containment to be installed around difficult to move equipment, spill-prone areas or areas where a standard-shaped berm wont' work. heavy duty vented Corner pieces are key to providing a full spill containment. These allow air to flow thru as forklift traffic and hand truck equipment are being used. Non-absorbent Orange modified PVC coated fabric provides a highly resistant barrier to contain oils, gasoline, acids and other liquids. Justrite® Make-A-Berm™ Vented Corner, Heavy Duty, For Use With: Vehicle Traffic, Fork Lifts, Wheeled Carts and Hand Carts, Specifications: Rectangular Berm, Open Cell Urethane Foam, -40 to 180 °F, PVC Coated Fabric, Orange, 11 in L x 5-1/2 in W x 2 in H Dimensions