This Resonance Apparatus allows students to determine the speed of sound. Acrylic tube measures approx. 40.75″ tall long and a 1″ diameter. Tube is graduated. Metal Base measures 10″ x 11″ with clamp able edges. Black coated threaded rod measures approx. 41″ 3/4 Comes with 2 ring clamps 1.25″ and 3″ inside diameters. Metal Vessel measures 3 ” diameter which’s connects to Rubber tubing measuring 39.50 inches long with a 5/16 inside diameter to connect to the glass tube.