Attention scuba divers and dive shop owners! These little HP port plugs might be small, but they're absolutely essential for protecting your expensive regulator investment. This pack comes with three 7/16 inch thread protectors that fit most high-pressure ports on scuba regulators. When you're not using your regulator or when you need to transport it, these plugs keep dirt, sand, salt, and other debris out of the delicate HP ports. That means no corrosion, no damaged threads, and no expensive repairs down the line. They're made from durable material that can handle the harsh marine environment without degrading. Super easy to use - just screw them into any unused HP ports on your first stage, and you're good to go. They're especially useful when traveling with your gear, storing regulators between dives, or when you have ports that aren't being used for gauges or inflators. Every serious diver should have a set of these in their gear bag. They cost pennies compared to what you'd pay for repairing damaged regulator ports, and they help ensure your life-support equipment stays in perfect working condition. Whether you're a recreational diver, instructor, or dive professional, these simple plugs are one of those small accessories that make a big difference in maintaining your gear properly. Don't risk your expensive regulators - protect those threads with these affordable and effective port plugs!