N-BK7 Optical borosilicate-crown glass from SCHOTT

BK7 Cute, KTV microphone, BT , 1200mAh battery for 8 hours of work, support TF card BT playback modes, variety of funny sound effects

BK7 is a standard glass for all kinds of optics The SCHOTT glass is nearly bubble free, has an excellent clarity, and a very low amount of inclusions

bk7 slot BK7 Cute, KTV microphone, BT , 1200mAh battery for 8 hours of work, support TF card BT playback modes, variety of funny sound effects

bk7com สล็อต N-BK7 is a Schott designation for the most common Borosilicate Crown glass used for a wide variety of visible applications