This lot is for 2 (two) pcs of Russian GEIGER TUBE COUNTER STS-6 (SBM-19) Beta / Gamma Radiation detector, that could be used in various DIY and hobby project or industrial application. The tube STS-6 is more sensitive, that popular SBM-20, so it could check lower radiations values. Lamp is coming as new in original packing, with instructions (passport), which has military Quality Pass (OTK) stamp for each tube.