Monolithic Crystal Filters Dimensions (mm) Specification 　 L M N P Q S HC-49/U 13.50 13.20 11.50 0.43 2.44 5.00 HC-49/T 11.00 13.20 11.50 0.43 2.44 5.00 UM-1 8.00 20.00 7.80 0.35 1.88 3.10 UM-5 6.00 20.00 7.80 0.35 1.88 3.10 Frequency: 10.7MHz 17.9MHz 21.4MHz 21.6MHz 45MHz 90MHz