Product Specifications:The ground-mounted iron spring volleyball post pole includes a pre-buried component with an embedding depth of 400mm and a telescopic range from 1730mm to 2530mm. Material Composition:The main pole is constructed from Φ89x5.0 seamless steel tubes, while the telescopic pole utilizes Φ70x4.0 seamless steel tubes. The outer base of the volleyball pole features a 40mm thick specialized cushion pad that, when paired with the pre-buried component, acts as a buffer, effectively prolonging the lifespan of both the pre-buried component and the pole. The pre-buried tube of the volleyball pole is a seamless steel tube of Ø102x5.0. The end of the pre-buried component is equipped with a dedicated copper cap. During use, the copper cap is lifted, and the pole is inserted into the pre-buried hole for immediate operation. When not in use, the volleyball pole is removed, and the copper cap is replaced, offering convenience and ensuring the copper cap's suitabi…