Hoppy Trailer Wiring Hopkins Inc. is widely known for the wiring and towing fixtures that last the long hauls and suit all the needs anyone has when it comes to such things. All Battery Sales and Service Online is a proud distributor of their products, and offer them all at low and competitive prices. From Brake Controllers to Trailer "Pigtails" we have what you need. Please browse our selections and offer us the privilege of your business.