Mechanical applications features environments that require lubrication and the exposure of oil and other fluid materials. This means that the sealing components needs to be very resistant to these substances. Additionally, great consideration needs to be taken to the size of the groove and set aside space for the volume change, such as designing a pump. These parameters will determine the suitable size of the sealing component. The material the seal is made of can not contain any materials that may deteriorate the oil quality or corrode other parts. Also, we need to take into account the cycle or pressure changes of the mechanical operation. NBR is the most often used material although other materials will be more fitting depending on the temperature and media.