Vestil PLID-D Poly Lids for D-Style Self-Dumping Hoppers keep the contents of hoppers out of sight for a cleaner appearance. Constructed from heavy-duty virgin polyethylene material, these lids are lightweight and easy to open. The top of the lid includes a crown for water drainage, and a ribbed design for strength and aesthetics. The maximum continuous temperature without bending or deformation is 150°. Ideal for schools, hospitals and warehouses. Factory installed when ordered with hopper, but may also be easily field installed. Standard color is black, but selected models are also available in blue. These heavy-duty D-style hopper lids are not compatible with LUG option.