These 120x28mm decking boards come in 4.8m lengths and have a grooved anti-slip finish on one side. They have been pressure treated for a longer life and are manufactured to offer a fantastic value-for-money option without sacrificing quality. Maintenence notes: Use a preserver in the drill holes as well as on cut ends to prolong the deck's life Always keep clean and recoat all sides with a deck seal, deck oil or deck stain to help prevent splitting, warping and rot Timber expands and contracts in different weather conditions, some dimensional variation should be expected. Please note: It is recommended to leave your new decking for a period of between three to six months before adding decorative treatments. This is to ensure it's been allowed to fully acclimatise and settle.