This Resonance Tube Apparatus allows students to determine the speed of sound. The acrylic tube measures approximately 77" long with a diameter of 0.5". It comes with a heavy duty metal base that is sturdy and measures 11" x 10" with clampable edges. The black coated threaded rod measures approx. 49" long with a 0.5" diameter. Two ring clamps are included: one O-shaped clamp (7' long, 2" wide, 1.25 diameter) and one C-shaped clamp (8.5" long, 3.5" wide, 3" diameter). Measuring cup is approximately 4" tall, 3.25" wide, 2.75: diameter, 250mL capacity. Measuring tube is approximately 49" long with a 1.25" diameter. The apparatus stands approximately 50" tall when assembled with the base.