Injector stacks. 8 Black powder coated 1 3/4 OD X 3 1/8 long. I used these on my Packard V8. 4 Red painted steel 1 7/8 X 3 13/16 long. Two with added thing for my return springs to hook into. I think I used these on my EVM injected Pinto engine and two more that are not painted. And some remnants that can have hold down ears brazed on or something. Up to you. $30. Powder coat cost more than that. + shipping from 94401 V4GMR@yahoo.com