The CF4040M00010T8188058 is a surface mount crystal with 4 pins that has a ROHS certification for environmental safety. This crystal is manufactured by JWT, and has a frequency of 10 MHz. It is leadfree and halide-free, per the ROHS certification. The physical size of the crystal is 3225-4P, meaning that the lead diameter is 3.2 mm and the lead pitch is 2.5 mm.