The internal dampening material that we use runs the full length of the stabilizer to reduce vibration and noise before it reaches the riser and your arms. We also use a High Modulus carbon fiber tube which also adds an extra vibration reducing element. 6061 aluminum end caps are CNC machined for tight fit and powder coated with 16 different color options to match your set up. The proximal and distal ends diameter on both the .750 and .630 diameter bars matches our weights as with the QD and Offset mount in the same diameter, giving it a very aesthetically pleasing appearance.