Pulwell?manufactures high strength, light weight and maintenance free?fiberglass?posts for vineyard?grapes trellis. The fiberglass grape posts will not rust or rot, and easily installed by machine or by hand.Product Type: ?Fiberglass grape posts, vineyard poles? Material: fiberglass reinforced polymer ( GFRP) Surface:?smooth Size:?6mm to 22mm dia. Shape:?straight in specific length with one pencil end UV property:?UV inhibitor Application:?vineyard posts, grape poles Packaging: bundles and pallets Contact us for more details http://www.gfrp-china.com/plant-stakes/vine-stakes/high-strength-cost-effective-fiberglass.html