Features: Made of high quality material, very durable and stable to use. It provides a stable signal for integrated circuits and it stabilizes the frequencies of radio transmitters and receivers. This set is organized by size in a transparent storage case for quick access and protection. There are 11 different size to meet your various needs. Widely used in TV, automobile electronics, pc cards, electronic meter, DVD, MP3, MP4, etc. Specifications: Material: Quartz Crystal Color: Silver Quantity: 55pcs (11value and each value 5pcs) Weight: Approx. 58g Types 32.768KHZ 2x6 / 3x8 4MHZ 49S (DIP) 6MHZ 49S (DIP) 8MHZ 49S (DIP) 10MHZ 49S (DIP) 11.0592MHZ 49S (DIP) 12MHZ 49S (DIP) 16MHZ 49S (DIP) 20MHZ 49S (DIP) 24MHZ 49S (DIP) Package Included: 55 x Quartz Crystal Oscillator 1 x Plastic Case 1、Made of high quality material, very durable and stable to use. 2、It provides a stable signal for integrated circuits and it stabilizes the frequencies of radio transmitters and receivers. 3、This set is organized by size in a transparent storage case for quick access and protection. 4、There are 11 different size to meet your various needs. 5、Widely used in TV, automobile electronics, pc cards, electronic meter, DVD, MP3, MP4, etc.