Gretex Industries Limited is an India-based company that is engaged in manufacturing of hosiery goods and sale of musical instruments. The Company is an authorized distributor of various branded musical instruments, including Yamaha, D’addario, Harman, Alphatech, Sennheiser and Gappu Cajons & Percussion. Yamaha provides guitars, keyboard, drum pad, digital piano, recorder, adaptors & foot controller, switch and synthesizer. D’addario offers strings, drum head, drum stick, reed and guitar accessories. Alphatech supplies high/low end speakers, mikes, amplifiers, pedals, projectors, light emitting diode (LED) screen, processors, mixers and others. Sennheiser offers earphones and headphones. Gappu Cajons offers a range of percussion instruments, including cajon, wooden shaker, wooden bongo, foot tambourine, cajon drum, octa snare cajon, tilt cajon, travel cajon, small cajon and impulse cajon. It has two warehouses in Kolkata and Guwahati.