[Features] - Water bearing pressure: 0.98 MPa (10.0 kgf/cm2) per hour. - Use as ceiling material for the bored parts when boring holes into the box main body and retaining with screws. - NBR (nitrile rubber) is a general purpose rubber that has particularly good oil resistance as a sealing material. - Silicon rubber can be used in a broad range of temperatures and boasts superior heat resistance, cold resistance, and water resistance. - The shape of the rubber used in each model is different, but the performance of each is equivalent.