Great Southern offers a range of deer posts, strainers and stays. A range of sizes come pointed and non pointed. 1.5m Deer Extension. 1.8m Deer Extension. 2.1m Deer Extension. 2.7m x 100mm Treated Deer Post. 2.7m x 125mm Treated Deer Post. 2.7m x 150mm Treated Deer Post. 2.7m x 175mm Treated Deer Post. 3.0m x 175mm Treated Strainer. 3.0m x 200mm Treated Strainer. 3.6m x 175mm Treated Strainer. 3.6m x 200mm Treated Strainer. The Great Southern group sources, produces, steams and treats all their own roundwood locally. We aim for the highest standards in quality and sizing. All roundwood is measured S.E.D (small end diameter). Call your nearest branch for available stock and pricing.