Fit for basin taps in bathroom, kitchen, etc. Suitable for both hot and cold water. Solid brass stem body. 20 Teeth on spline (top of stem) for handle, idler stem with M4 threaded hole. Clockwise () counterclockwise (red) to turn on the tap. Solid brass stem body. Thread size G 1/2" BSP. Rubber O Ring, with threaded collar.