Fluorescent Sky Blue Concentric Knob Set (1)


Our Fluorescent Concentric Knobs are made with a UV (black light) reactive pigment. They are semi-transparent which allows for maximum light absorption and will glow brightly under any UV light source. Please note that these knobs will not glow without a UV light source. LED black lights produce a better glow than most fluorescent UV light bulbs. The darker the color the closer the knob will need to be to the light source for the maximum glow effect and will not glow as noticeably as the lighter colors. However, these knobs are beautiful with or without the additional lighting!

Concentric Knob Information

Our standard concentric knobs are manufactured to be simple and easy to install while still retaining their visual stimulation with a mirror like finish and comfortable grip.  Dome style concentric knobs have been the main focus of our production as we appreciate the sleek design and functionality. After extensive research we found a material to use in knob production that is extremely durable, lightweight and allows for the most vivid colors and effects.

We use a standard upper knob shaft opening that is universal for any 6mm coarse splined, fine splined or solid pot shaft. Like most dome knobs, these include a 1/8” set screw to secure the knob to the shaft. The set screw color option may be changed at checkout. The lower knob shaft opening is 8mm and contains a separate set screw.

Please be sure to measure your shaft size before ordering.

*All of our knobs come with a complimentary alan wrench and lint-free cotton polishing pad.


            Once the knob is in the desired location, simply hand tighten the set screw with the provided alan wrench. Do not over tighten the screw.

Basic Concentric Knob Information:

Weight: 3.9 grams

Material: Lightweight Urethane Resin

Size: Upper Knob: 6mm shaft opening/ Upper knob dimensions: 14.2mm W x 15.1mm H

        Lower Knob: 8mm shaft opening/ Lower knob dimensions: 18mm W x 12.8mm H

Fits: 6mm/8mm Concentric potentiometers


We are more than happy to accept returns and will work to resolve any issue promptly and accurately regardless of the nature of the return. If we feel that our products have been misused or intentionally damaged we may not be able to offer a refund. Otherwise we are happy to refund, exchange, customize or create the right knobs for your project!

Our promise

            The sole reason we are able to grow as a business and share our products with the world is you! Our customers! Without you there would be no us! We will go the extra mile to ensure 100% of our customers are 100% happy. Our promise is that we will deliver the highest quality products with the most helpful and accommodating customer service in the fastest way possible. We have based this company on customer satisfaction and you are always our #1 priority.

In stock (can be backordered)


Additional information

Weight 3 oz
Dimensions 5 x 3 x 2 in

2 reviews for Fluorescent Sky Blue Concentric Knob Set (1)

  1. 3 out of 5

    Viagra Pfizer Pas Cher En Quimper Keflex Seismic Loop [url=http://ausgsm.com][/url] Cheap Viagra Generic Cialis Samples Import Kamagra India

  2. 2 out of 5

    Propecia Generic Drug Amertripaline On Salle Propecia 1.5 [url=http://cialisab.com]cialis 20mg for sale[/url] Order Metformin Online

Add a Review