Male NPT tapered black nipple pipe coated schedule 40 suitable for indoor use only. Pipes are low presssure applications such as water, oil, gas, steam and air. The Pipe is available in several sizes and length for all types of residential and commercial plumbing applications. Great for all your DIY projects to add the industrial feel. ⚠ California Proposition 65 Warning: This product is known to the state of California to cause cancer, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.