SMD UB-4 (Universal Power/ Grounding Bar - 4 post)
 
Clean up your messy wiring and prevent engine noise with this easy to use bus bar/distribution block. Using a 3/4" HDPE Body, A 3/16" Clear Acrylic cover and all Stainless Steel hardware (or copper), this high-quality product is all you need to install multiple amplifiers (and other 12v Devices) to one central location. Can be used as a grounding block or positive distribution. 
 
Accepts any ring terminal with 5/16" Hole
Made in California, USA!