Partsam Waterproof 4 x 4" Round 24 LED Red/Amber Double Face Stop Turn Fender Pedestal Signal Tail Lights+Chrome Reflector for Trailer Truck Kenworth Freightliner Peterbilt Mack Western Star Volvo Partsam Red/Amber 12V Stop/Tail/Turn Light, Double Faces 24 Diodes LED Tractor Tail Lamp light. Function as Stop/Tail/Turn Signal light, Back Position Lamp, LED Marker Clearance Lamps PC lens and housing ultrasonically welded together to ensure a permanent and waterproof seal EASY TO INSTALL: Three wire design assembly- Black wire is ground, when you connect white wire, one side leds on,when you connect red wire, the other side leds on Size: 146mm x 106mm x 58mm (5.75inch x 4.17inch x 2.28inch) - LxWxH It all started in the summer of 2013 with a simple, with bold idea: make better auto parts. In other words, not just a better auto parts - a better way of doing things. A new kind of auto company that works hand in hand with users to do something amazing, something meaningful. Now PARTSam has grown tremendously to become one of the leading platforms of e-Commerce in the aftermarket auto parts industry. Inventory Management/Warehouse &amp; Fulfillment  With our warehouse located in Milpitas, California, we take care of the inventory management for our products. This saves manufacturers space, time, and headache. Automated Multi-Channel Sales  We successfully advertise our products on multiple platforms and maintain top-rated healthy seller accounts, which keep customers drawn to our products. We are continually expanding our customer base as we add more sales channels. Professional Seller - Customers will deal directly with us in regards to issues and concerns they experience with the products. Manufacturers will not have to deal directly with the individual customers, but will experience the benefits of their business, which is the typical win-win cooperation. For Heavy duty trucks tractors like Peterbilt, freightliner, international, Kenworth, Mack, Western Star,Volvo,Paccar etc. They can be also be used to DIY on other vehicles as trailers, tractors, semi-trailer, dump truck, bus, boat, special vehicle, etc. Dimension: 5.8&#039;&#039; x 4.2&#039;&#039; x 2.3&#039;&#039; 2pc Red/Amber Lights+2pc Clear lens Red/Amber Lights 24 Diodes,Double Face,Pedestal Mount,Waterproof Lens Function as Stop/Tail/Turn Brake Pedestal Fender Marker Clearance light