4 Hole HP Nut Auto Tapered 120N
Difference between Fiber Optic vs Power Optic Tubing
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Fiber optic tubing has a glass bundle running through the center. The light source comes from a box where the bulb is located and the bundle plugs into the box.
Power optic tubing has two small wires running through it. The power source is a transformer and power pack or air electric switch. A light bulb will also be needed.