Replacement for Tedea Model 1040. Mounting screws are 1/4-20 UNC(coarse) with 3/4" spacing on both top and bottom. These cells have a unique humidity resistant protective coating assures long term stability even under harsh environment and extreme temperatures. 2 mv/v, 0.02% total error, 9 ft 6 cond cable, 415/350 ohm, anodized aluminum. NTEP 96-132 S III 5,000 div