The CX11L AT from IQD Frequency Products is a RF Quartz Crystal with Frequency 16 to 50 MHz, Frequency Stability ±10 to ±100 ppm, Frequency Tolerance ±30 to ±100 ppm, Drive Power Level 200 µW, Load Capacitance 10 pF. Tags: Ceramic. More details for CX11L AT can be seen below.