Description: Screw this dust plug adapter holder onto the trailer, after parking the trailer, plug in the 13 pin plug, 13 to 7 pin adapter, or 7 to 13 pin the hook adapter plugs into the socket. This trailer adapter protection holder can be used on bike racks, mobile homes or horse trailers, and it is waterproof and can also keep dust out. Trailer plug holder with locking nose, locks adapter firmly, easy to install, use this plug bracket to protect the copper contacts of the plug from damage. You can screw the trailer adapter plug holder to the tow bar, really practical and useful trailer accessories, nice choice for you. Made of high quality metal and ABS plastic, this trailer connector holder is fire retardant, high temperature resistant, sturdy, not easy to break. Specification: Material: ABS Color:Black Size Chart: 95x37mm/3.74x1.46inch Package Includes: 1 Piece Trailer Plug Holder(4 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!