Consists of two plastic tubes, 305 x 32 mm and 305 x 25 mm diameter. The smaller tube slides within the other in foam-plastic collars, allowing the air-column length to vary from 300 to 530 mm.

We are manufacturers and suppliers of the Resonance Apparatus Tubes, serving Algeria, Argentina, Australia, Bahrain, Bangladesh, Belgium, Bhutan, Brazil, Cambodia, Cuba, Cyprus, Denmark, Ecuador, Egypt, Ethiopia, Finland, France, Georgia, Germany, Ghana, Hungary, Iceland, Italy, Japan, Jordan, Kenya, Kuwait, Malaysia, the Philippines, Tanzania and Uganda.