The OM SYSTEM PRPC-EP02 Rear Cap is a protective accessory designed to cover the rear opening of the PPO-EP02 underwater port when it is not attached to a camera housing. By shielding the port from water, moisture, dust, dirt, and other contaminants, it helps maintain the condition of your underwater equipment and ensures it is ready for use when needed. Ideal as a spare or replacement component, the PRPC-EP02 provides reliable protection during storage, transport, and handling, helping extend the life and performance of your underwater photography gear. | Om System | | PRPC-EP02 Rear Cap for PPO-EP02 Underwater Lens Port, Protective Dust and Moisture Cover Replacement | Black | Best Buy