Description Literature Description Freudenberg Sealing Technologies (formerly Tobul) Free Flow Manual Ball Valve. SAE O-ring style, 3000 PSI, 1-1/2" flow, SAE-24 ports with Buna-N seals. Free flow manual ball valves allow precise flow control and offers minimum frictional resistance ensuring no leakages, damages or blockages. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Literature & Docs Accessories