Feature 1Made of high quality material, very durable and stable to use 2It provides a stable signal for integrated circuits and it stabilizes the frequencies of radio transmitters and receivers 3This set is organized by size in transparent storage bag for quick access and protection 4There are 10 different size to meet your various needs 5Widely used in TV, automobile electronics, pc cards, electronic meter, DVD, MP3, MP4, etc.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 transparent storage bag for quick access and protection. There are 10 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: 50pcs (10value and each value 5pcs) Weight: Approx. 26g Sizes & Quantity 32.768KHZ 2*6 5pcs 32.768KHZ 3*8 5pcs 4MHZ 49S 5pcs 6MHZ 49S 5pcs 8MHZ 49S 5pcs 10MHZ 49S 5pcs 11.0592MHZ 49S 5pcs 12MHZ 49S 5pcs 20MHZ 49S 5pcs 24MHZ 49S 5pcs Package Included: 50 x Quartz Crystal Oscillator