Precast Systems bunker silos are 8 1/2′ tall and come in lengths of 5′ and 7 1/2′. We have two styles, the “L-panel” and the “T-panel”. The L-panel are used for the outside walls andthey are bolted together. The T-panel can be used for outside walls or a divider wall. We have radius corners at the top of our panels to eliminate the chance of tearing the plastic cover.