The CFB Series from Crescent Frequency Products is a RF Quartz Crystal with Frequency 3.5 to 80 MHz, Frequency Stability 15 to 100 ppm, Frequency Tolerance 10 to 50 ppm, Load Capacitance 18 pF, Shunt Capacitance 7 pF. Tags: Surface Mount. More details for CFB Series can be seen below.