N-BK7 Optical borosilicate-crown glass from SCHOTT

bk7 slot  N-BK7 is a Schott designation for the most common Borosilicate Crown glass used for a wide variety of visible applications  BK7 Cute, KTV microphone, BT , 1200mAh battery for 8 hours of work, support TF card BT playback modes, variety of funny sound effects

BK7 optical glass OPTIMUM TRANSMISSION RANGE 350nm Our online casino platform offers several categories of games such as sportsbook, live casino, esports betting, fishing games, 4D lottery, slot machines, etc

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