This decade capacitance box provides accurate capacitor values from 10 to 100 pF in 10 pF steps, serving as a laboratory standard with ±5% accuracy and a 63V voltage rating. The decade design allows precise selection of capacitance values for circuit experiments. Useful in resonance timing, wave shaping, and oscillator experiments. Suitable for electronics laboratories and physics classrooms studying AC circuits, RC time constants, and frequency response.