Replacement timer knob and overlay decal sticker for ESB tanning beds with a twist-style mechanical timer. Black plastic knob with an orange indicator marking. Overlay has a peel-and-stick back. New factory replacement part. Knob Measurements: .234" Stem Diameter .180" on the flat spot. Fits: ESB, Solar Wave, and Solar Storm with "twist-style" timers. *I also have other Solar Storm, Solar Wave, ESB replacement parts, manuals, and tanning accessories that are not listed in my store so just ask if you need something not listed. **If you use the CART feature, shipping charges can be combined if you are purchasing multiple items in different categories.