Source Kit-1 type SK 210 offered by NUCLEONIX contains one each of Beta and Gamma sources. These are low activity disc sources of the order of 0.1 to 3 micro curie for Beta and Gamma. Gamma source disc is evaporated and sealed on 25mm dia X 5mm thick plastic disc. Where as Beta source disc is evaporated and sealed on 25mm X 10mm thick plastic disc and covered with 10mg/ sq.cm aluminised mylar window. This source kit is an ideal choice along with G.M. counting system for educational institutions and Research labs. Source kit containing the disc sources is offered in an acrylic box of dimensions 86mm X 46mm X 25mm (approx).