Cab Marker Light Covers are made of high quality ABS, 't fade from exposureDirect replacement for factory stock cab marker covers. No leakage.Faster on/off response time and vibration .High performance LED, long lifespan, superior illumination stability.Installation:Easy to Wire: Black to Ground and Red to Positive.(Instruction is not included) Covers are made of high quality ABS, 't fade from exposure Direct replacement for factory stock cab marker covers. No leakage. Faster on/off response time and vibration . High performance LED, long lifespan, superior illumination stability. Installation:Easy to Wire: Black to Ground and Red to Positive.(Instruction is not included) For the non-installed vehicles, you may need to drill holes for installation. If the LED 't light up, simply flip it 180 degrees. (reverse the polarity) Fitment:for F Super Duty Pickup Trucks 1973-1997 Type: Cab Marker Lights Condition: 100% New LED Type: 5-5050-SMD LED High Power Part Number: 15442 Types: A-Yellow shell yellow light white background Colour:yellow Material:ABS Size:Hole Distance: 70mm (2.75 inch) Package Contents: 5 x Cab Marker Lights Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.