26015 Chemical experiment device for magnetic teac

The product is composed of teaching board, magnetic block and chemical device. Demonstration board 38, for the production of white plastic plate with 3mm thickness, the size is 80 * 45mm, the teach board back embedded two blocks with 4 * 2mm magnets, each magnet surface magnetic induction intensity is less than 20GS; 38 kinds of chemical device schematic plan printed on the demonstration board, respectively. A series of "1 to 38" serial number.