ECS-120-18-5G3X-JGN-TR

Crystal - 12MHz ±20ppm - 18pF - 50 Ohm - ±30ppm -40°C to 85°C - SMD HC49/US - 0.449" L x 0.185" W x 0.165" (11.40mm x 4.70mm x 4.20mm)