American Educational Products 7-2305 Wheatstone Bridge With Instructions - DenTek lace up and see for

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American Educational Products 7-2305 Wheatstone Bridge With Instructions - DenTek lace up and see forAmerican Educational Products 7 2305 Wheatstone Bridge With Instructions Features Brand: American Educational Products Wheatstone bridge experimental set for study of electricity and electrical circuits Nickel plated metal strip and light hardwood meter stick, with metal binding post for measuring electrical resistance Mounted on stained hardwood base for display CHOKING HAZARD Small parts. Not for children under 3 yrs.