The insulation panels are made of rigid polyurethane (PU) produced through high-pressure foaming. They feature metal surfaces on both the inner and outer layers, with options including colored steel sheets, embossed aluminum sheets, stainless steel sheets, and galvanized steel sheets. Polyurethane cold storage facilities are typically modular, assembled using polyurethane panels joined with advanced eccentric rotating locks to ensure effective refrigeration.

Based on its structure, a storage unit consists of the following components: base panel, side panels, top panel, corner panels, and door. The panels are connected using a tongue-and-groove system with eccentric hooks.