Ktech Tech 1 Stabilizer 2.1" 4.4oz. Carbon Stabilizer utilizing Mathews Harmonic Stabilizer Technology 100% CNC Machined 6061-T6 Aluminum Includes (1) Harmonic Stabilizer - 4.6 oz. Overall Length = 2.10" Each Port is machined with (3) grooves to provide different configurations of the Harmonic Stabilizer