This F111 is manufactured by Boteco. It has a solid 6 lobe knob with male threaded stud. It is made up of reinforced polyamide and oils and greases resistant. The said product comes with a satin surface and the main insert is zinc plated steel threaded stud (tolerance 6g). In addition, The model is available in black color. moreover, The F111 has the capability to supply inserts in different lengths or by special design, on request and for quantities.