Feature:_x000D_ _x000D_ High quality NBR embedded, better sealing effectiveness. _x000D_ It can be used in extreme conditions, maximum pressure 40 MPa, maximum working range of minus 25 degrees Celsius, to 100 degrees Celsius. _x000D_ Suitable for pipe connections, screw plugs, and pressure system of mechanical devices. _x000D_ Prevent water, oil, fuel, etc from leaking. _x000D_ 12 different specifications to meet your needs of different sizes. _x000D_ _x000D_ Specification:_x000D_ Material: Metal and NBR_x000D_ Weight: 745g / 26.28oz_x000D_ Working pressure: -25 - +100_x000D_ Working temperature: 40MPa / 5800psi (Max)_x000D_ Working medium: Oil_x000D_ Inside diameter: 6\8\10\12\14\16\18\20\22\24\27\30mm / 0.24\0.31\0.39\0.47\0.55\0.63\0.71\0.79\0.87\0.94\1.06\1.18in_x000D_ _x000D_ Package list:_x000D_ 240 * Ring(1 box, 12*20)_x000D_ _x000D_ Note:_x000D_ The actual product color may deviate from the photo due to light.