KF style flange clamp for our 200mm (8 in), 300mm (12 in) and 400mm (16 in) kilo scale reactor vessels. The 200 & 300mm clamps are manufactured of black, phenolic resin while our 400mm clamp is black, powder coated aluminum. Purchase the clamp and appropriate gasket separately. We recommend the purchase of the appropriate torque wrench and socket to ensure safe and effective tightening. Replacement inserts and clips available for the phenolic resin clamps.