Treated Pine Sleepers 150 x 75 H4 Timber 2.4mTreated Pine Sleepers 150 x 75 x 2. 4m Rough Sawn H4 Treated Pine Sleepers are Ideal for landscaping applications such as retaining walls, steps in sloped yards, driveway or path edging. Our sleepers are all treated to H4, which is suitable for most in ground applications, protecting against fungal decay and termite attack. Treated pine sleepers are very affordable. Available in Lengths 2. 4m, 3. 0m Select from the Options Menu