This 4" stabilizer is made from our special A-Tech rubber. These stabilizers are the next generation in sound and vibration dampening. Also, they are the only fully adjustable stabilizer on the market today. There are no steel rods or supports running through our stabilizers to transfer vibration back to your bow. This gives them the ability to dampen 360˚! They also incorporate our patented Shock Block Technology! Our 4" weighs 3.4 oz.