GMORS O-Ring Master is the completed tool for standard rubber seal sizes.When you use this APP, you do not need to have internet.In addition to O-Ring sizes, it also includes the search functions of X-Ring and Back-Up Ring.You can also use O-Ring Housing to choose suitable O-Ring in your application.Main functions are as follows:Dimension Search: O-Ring, X-Ring and Back-Up Ring.- MM and Inch are both available.- Full standard O-Ring series: AS568, METRIC, JIS B2401 P / G / S / V, JASO F404, GB / T 3452.1, BS 4518 and SMS 1586.- Collocated Back-Up for AS-568 O-Ring.- Substitutable O-Ring sizes within tolerance are available.O-Ring Housing: Piston Sealing, Rod Sealing and Face Sealing.- MM and Inch are both available.- Support calculation for both Static and Dynamic sealing applications (Face sealing is with static calculation only).- Up to 7 O-Ring standards (AS568, METRIC, JIS B2401 P / G / S / V, JASO F404, GB / T 3452.1, BS 4518 and SMS 1586) for most of size requirement of different groove design.