Description Description The Haskel 16510 is a black plug that is used to seal the air valve of the Haskel 10 HP pump series. The plug is made of durable material and has an O-ring for a tight fit. The plug is easy to install and remove, and can withstand high pressures and temperatures. The Haskel 16510 is compatible with various drive medias, such as compressed air, nitrogen, CO2, natural gas, and sour gas. The plug is an essential part of the Haskel pump system, which can deliver high performance and efficiency in various applications. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Literature & Docs Accessories