Spruce decking typically contains smaller less obvious natural defects such as large knots which lends to a clean surface appearance, Tanalith E wood treatment conforms to new European standards & contains no arsenic or chrome, Only sustainable well managed raw materials from PEFC certified sources are used in the production of these B&Q decking products, Home delivered decking kit, preservative treated for longer life, Sold in kit form for self assembly, Supplied with all fixings & fittings