PE300 Sheet Natural. PE300, otherwise known as HDPE (High Density Polyethylene), is a high impact strength grade of PE. This item is available for delivery within 7-14 days. Minimum we can cut to is. 1000mm x 1000mm. From: £40.35 excl. VAT. 1/16 pe 300 polyethylene sheet for Marine land reclamation. HDPE Sheet.