Shocktech Spyder LPR Low Pressure Volumizer Chamber - Silver Replaces the front plug on most standard Spyders, Rebels and Spyder compatible clones. Solid stainless steel construction. This High Volume Cell (HVC) acts as a 'CO2 staging area' allowing a greater mass of air to lie in reserve in front of the valve assembly creating more consistent shots. Proven better consistency and power for your Spyder. Also improves your gas efficiency!