G28102 ` Rare EON 620IT Alpha, Beta Gamma, Mica Window Geiger Tube

Rare EON 620IT Geiger Mueller Tube has an opaque grey color mica end window. This tube can detect alpha, beta and gamma rays. Operates on 700 to 900VDC. Metal end is (+) and body is (-). This tube is new - old stock. We test it before shipping! Size about 6" long x 0.88" dia with 1" dia. end cap. Has plastic protection cover on end cap, please don't touch mica window because it will damage tube.