Replacement knob ONLY for Genkins GK4500i watts Generator Inverter (4500 W Peak / 3800 W Rated) and compatible screw Do not buy it for other generator brands or models only because it 'looks like it' - it may/will not work for other generators It does come with one compatible screw Direct replacement of the OEM knob, easy and quick instalation If you have any issues with this knob, please contact me first and I will work with you to solve the problem. Please consider buying this knob only for the generators listed in the description. The knobs from one generator, in most of the cases do NOT fit other generators, there are small differences that makes the knobs not compatible. This is a replacement switch, knob ONLY for the Genkins GK4500i watts Generator Inverter (4500 W Peak / 3800 W Rated). It is used for the Off, Choke and Run selector switch. The knob may come in black, red, or orange color, based on the available stock. If you want a specific color, please ask BEFORE you buy, not AFTER. The switch, knob connects to the metal shaft on the generator with a machine screw. You will receive only the knob and the compatible screw, not the generators from the pictures. This knob may also fit other generators that use the same knob, but it was not tested on other models. The shaft of the 3d printed knob it is thicker than the original one, to provide more strength, without affecting functionality. I also have knobs for many other brands and models of generator inverters, in the case this is not the one for you. You just need to look in my store or ask me. This knob it is 3d printed from black PETG material which has better temperature resistance than other materials, like PLA, so it will perform better at high temperatures. This part was 3d printed on my 3d printer, in US. This is a part that was custom 3D printed from PETG based on my design based on an original knob (you will not receive the original knob). If you are not familiar with the 3D printing process, this part may not be for you, as those parts may have small residues from the printing process. ------ If you have any issues with this knob, please contact me first and I will work with you to solve the problem.