Developed for our HL-1 tonearm, the Harmonic Level Counterweight assembly can be easily fitted to all Rega made tonearms with outstanding sonic results. The counterweight extension (rear stub) is made from acrylic as this material is light, rigid and does not 'ring' - unlike metal. The counterweight is machined from stainless steel and has the centre hole near the top edge, placing the centre of mass in the same horizontal plane as the stylus. The counterweight is rigidly coupled to the acrylic stub by an allen headed grub screw. The improvement this assembly makes to any Rega arm is incredible and must be heard to be believed!