Hey electronics hobbyists and repair folks! This uxcell WH138 potentiometer is a solid little component for all kinds of projects. Rated at 500K ohms with +/-10% tolerance, it's perfect for audio equipment, lighting controls, speed regulators, and various electronic devices. The single turn linear taper gives you smooth adjustment throughout the rotation range. It features 5 terminals for versatile wiring options and includes a built-in switch, which is super handy for power control. The knurled shaft is 6mm in diameter with a split design that grips standard knobs securely (knobs not included though). Overall height is 44mm with a base size of 17x24mm, and it installs through a 7.6mm threaded bushing. The top adjustment design makes it easy to operate once installed in your panel. I've used these for repairing guitar amplifiers, building custom audio mixers, and even for fan speed controllers. The carbon film construction provides stable performance and decent lifespan. The shaft length is 13mm (not counting the threaded part), giving you plenty to work with for attaching knobs. Whether you're working on vintage audio gear, custom lighting systems, or industrial controls, this potentiometer delivers reliable performance. The quality is consistent with uxcell's reputation for decent components at reasonable prices. Just remember to order knobs separately if you need them!