Standard Polystyrene 50MM 2400 x 1200 x 10 Sheets. Important: Please advise a mobile contact number or landline number. Hi, many thanks for visiting one of the many products we offer. If you are looking to purchase this product please provide us with a home and mobile phone number and any directional information for our drivers if needed. If you have any questions please do not hesitate to email us through eBay. Your order is much appreciated, and we pride ourselves on our service. EPS70 grade polystyrene, the sheets are not pure white, and they may have grey or black specs on them. Ideal for all types of construction and self building projects.