The HC49/4HSMX 30/50/20/18 30 MHZ is a 11.4 x 4.9mm SMD Crystal with hermetically sealed in an inert atmosphere, resistance welded, glass to metal seals on leads and industrial standard package. Lead wires are mounted onto a plastic former to create a gull wing mount. Frequency range of 3.2 to 100MHz, load capacitance of 18pF and frequency tolerance at ±30ppm.