Further details are as follows A4 STAINLESS STEEL (MARINE GRADE). If you are not available to receive your delivery the parcel will be taken to your local access point. Explore Plus. This product is dispatched from Builder Depot and is available for in-store purchase. Washer Size - M12 (12mm). Teak Quarter Sawn 4' x 8' x 12mm $229.00. Check Price and Buy Online. CenturyPly 18 MM Sainik MR 8X4 Plywood. 5/5 Good quality, well packaged with no dings and minimal warping . Our products are high in demand due to their premium quality, seamless finish, different patterns and affordable prices. Whilst naturally resistant to decay and the ingress of moisture, it is still important to ensure that once in situ both the edges and faces of the plywood are well sealed in order to increase service life.