I-Series Composite Starter/Perimeter Deck Board 25.4mm x 135mm x 4800mm in pewter is a lightweight, one-sided square edge deck board.Designed for use as a perimeter edge / starter board, this co-extruded deck board is low maintenance and offers protection from scratches, fading, moisture issues and decay.It is also stain and slip resistant.I-Series Pewter Composite Deck Boards have a natural wood grain appearance offering the look of real timber with the benefits of composite decking. Fixing clips are available separately to complete the 25 year warranty.