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Vial accuracy: ± .029° Digital accuracy: ± .05° at 0° and 90°; ± .2° between 0° and 90° Lengths, nonmagnetic edge: 14, 24, and 48 inches Lengths, magnetic edge: 24 and 48 inches Price range (for level, two AA batteries, and soft case): $200 to $280 Stabila 800/869-7460 stabila.com
I've never rushed out to buy the latest spirit level. My 78-inch Empire aluminum I-beam, for instance, is about 30 years old, predating the arrival of aluminum box-beam frames with solid-block acrylic vials. Despite its age, the frame is still true, and one plumb and one level barrel vial still work, provided I obey my alignment arrows.