Grotec is able to supply custom manufactured greenhouse poly to suit your project needs. All custom orders are subject to a 3000 pound minimum . Delivery dates are an estimate only. Grotec / Terralink are not responsible for delays on delivery from the manufacturer. Please order well in advance of need. Polyethylene plastic sheeting in the most common sizes for covering greenhouse structures. Available in various lengths and widths. Performance options include UV treated, dripless, infrared reflective and white (55% shade). Several thicknesses are available which offer from 1 to 4 year durability.