5 x deck boards at 28mmx 144mmx 2.4m, Manufactured using high quality durable Scandinavian Spruce from sustainable PEFC certified sources, Boards are pressure treated with a copper based Tanalith E wood preservative, giving it a distinctive greenish tone, Grooved on one side smooth on reverse, Tanalith E wood treatment conforms to new European standards & contains no arsenic or chrome, Spruce decking typically contains small knots which lends to a clean surface appearance