The 4 rules of gun safety were put in place to ensure people of all ages and experiences could understand the fundamentals of handling firearms safely. If these rules are followed 100% of the time, you can rest assured that you will never have an accident with your firearm. Embrace the gun safety mindset each and every time with this high quality PVC Patch. Manufactured with hook 'n loop backing. Approx 3.00"x3.25" size. Safety Lime Green Color