These are 7 Chakra Tuned Pipes. These 7 Tuned Pipes are based on- 1st Root/Muladhara (also Earth Day) 194.18 Hz 2nd Sacral/Svadhisthana (also Synodic Moon) 210.42 Hz 3rd Solar Plexus/Manipura (also Sun) 126.22 Hz 4th Heart/Anahata(also Earth Year)(also OM Fork) 136.10 Hz 5th Throat/Vishuddha (also Mercury) 141.27 Hz 6th Third Eye/Ajna (also Venus) 221.23 Hz 7th Crown/Sahasrara(also Platonic Year) 172.06 Hz The Chakra Chime Pipes can be used with the chakra system. There are 7 Pipes in this set . It is based on the mathematical rotation of the planets around our Sun. These pipes are NOT based on a musical scale. They work more on the cosmic multi-dimensions of our chakras, our not noticeable bodies or subtle parts. They also work on pathways as well as other gateways of energy. The planetary cycle of the solar System is used to arrive at accurate formulae on which this Chime set have been created. This links them to our cosmic multi-dimensional selves. Our this self is eternal, very not noticeable and approachable through layers, ladders, gateways and manifold levels of energy.These pipes are made from High Quality Heat Treated Aluminium Pipes producing beautiful and long lasting sound.Carefully tuned to actual frequency as mentioned.Gives Great healing effect.Dimensions of Pipe-Length – 32 to 42 inches appx,Diameter – 1 inch appx..Packing- 7 Piece Pipe with Rings on each side,1 Wood Hand Stand to hold 2 pipes at one time,1 Rubber Mallet. You can hang these Pipes on Wooden hand-stand with the help of Rings provided on sides of the Pipe.Use Rubber mallet to produce healing sound and frequency.