Floor ABS is made of engineering plastics, size of 400 x 200 x 20mm; component socket divided into two hole socket, samll four hole socket and big four hole socket, using engineering plastics making, and the surface of each module mark is arranged in the component name or circuit symbol. Physics demonstration experiment in junior middle school, the product is mainly composed of the bottom plate, the component socket, the plug wire, the switch, the battery seat, the small socket and so on. The two hole socket dimensions: 74* 33*32mm, the small four hole socket size:73 * 73 * 32mm, the big four hole socket size: 113 * 113 x 32mm.
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