Mardatt Assortment Carbon Thread Internal Review

【WHAT'S IN THE PACKAGE】 --- This set contains 25 pieces select pipe plugs, which is made to comply with NTP thread (American Standard Pipe Taper Thread), including 11/8", 21/4", 33/8", 41/2", 53/4". All are packed by sizes in a sturdy storage container for easy, convenient, hassle-free storage. 【HIGH QUALITY NPT PLUGS】--- Manufactured from durable carbon steel, they have high strength and solid construction with rust-resistant oil on the surface. Meanwhile, they are strong enough to use under pressure for long time even in harsh conditions. 【SIMPLE INSTALLATION】--- These pipe plugs are external threaded, just tighten with a wrench. Before installation, you can using a sealant (tape or paste) to aid in sealing. They offer secure and durable, good performance. 【PRACTICAL HELPER】--- These pipe plugs available in a range of standardized thread sizes. When you need an aid to prevent leakage of air, gases, fluids under pressure quickly and conveniently, turn to this plug. No need for welding, convenient & time-saving. 【WIDELY USED】--- These NPT pipe plugs are great for industrial use, widely applying to prevent leakage of gases, oil and fluids in your engine block, oil tank, drain pipe and more.