Cabelas.com. This is my 5" Diamond Stabilizer. It is approx. 1" in Diameter and weighs 3 1/2 oz. After shooting at 15,20,25, and 30 yards I have not noticed much difference in accuracy. I have noticed better balance while shooting as well as reduced noise and vibration. All in all I do feel this is a good product for its price. The quality is excellent and I would definitely recommend this product. GREAT FOR ELIMINATING NOISE & VIBRATION!!