<https://www.nanoscience-korea.com/product/kf-16-socket-weld-flange-ss-304-copy/#product>
<http://schema.org/description>
"KF VACUUM FITTINGS AND FLANGES\r\n\r\nKF vacuum fittings and flanges consist of two flanges coupled together by a centering ring with a O-ring and a clamp. With this kind of connection provides many advantages, such as easy and quick mounting, assembly without any tools, unlimited orientation and easy interchangeability.\r\n\r\nThe standard sizes for KF vacuum fittings and flanges are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50.\r\n\r\nKF vacuum fittings and flanges are includes KF clamp, KF claw clamp, KF centering ring, KF o-ring, KF blank flange, KF bored weld flange, KF socket weld flange, KF half nipple, KF full nipple, KF reducing conical, KF elbows, KF tees, KF 4-way crosses, KF reducing tees, KF reducing 4-way crosses, KF flange to hose nozzle and so on."
<https://www.nanoscience-korea.com/product/kf-16-socket-weld-flange-ss-304-copy/>