Description FEATURES:-Allow for safe release of firing pin springs-These snap caps are an excellent tool for teaching & eliminating flinching-12 Gauge-2/pack PRODUCT SPECIFICATIONS: Dimension     1.25 X 7.85 X 8.80 Height     1.2500 Width     7.8500 Length     8.8000 CALIBER/GAUGE     12 GAUGE MAGS ONLY COLOR/FINISH     RED MATERIAL     ALUMINUM NUMBER PER PACKAGE     2.0000