Specifications include, but are not limited to: Plastic Material: Base plastic resin for the cart body and lid must be first quality and medium to heavy-duty high-density polyethylene (HDPE) or Advance Rotational molding. If your cart is made of, other material please provide us with your material and it specifications. ; Resin Additives: The plastic resin must be enhanced with color pigment and ultraviolet inhibitor, which must be uniformly distributed throughout the finished container. All plastic parts shall be specifically prepared to be colorfast so that the plastic material does not alter or fade appreciably in normal use. Containers should be protected against ultraviolet rays.; Recycle Ability: The bidder must include with the bid any option for the repurchase/recycling of containers at the end of their useful life.