SeaStar - ORB Fitting Kit - Straight - 2 Pack - HF6009 ORB Fitting Kit, Pair by SeaStar Solutions. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at an affordable cost. Features: These fittings fit updated Seastar cylinders and all helm pump to use O-Ring (ORB) type fittings Before the update all Seastar Solutions helms used NPT fittings These 316 stainless steel fittings will simplify the installation process and will allow for simple reorientation of fittings after installation New ORB type helms are clearly marked with "DO NOT USE NPT Fitting" Cylinder Part Numbers ending in "-3" are the new updated cylinder models that use these ORB fittings.