3 out of 4 ain't bad is it? BTW in case you cant tell the one on the far right still is good. My guess is when I had the rebound dampening wrong the top out spring was taking one hell of a beating and going into coil bind, I think I have that problem solved now by changing the valve stacks and switching to a 15 weight oil. Rear res, over all length 7" inside diameter 1.720 " Front's are the same except they are 5-1/2" long End caps and floating piston The floating piston had a O ring to seal and a guide seal that helps keep the piston running square in the bore of the cylinder. Update: the volume of these reservoir's was small so I installed a larger set from Fox (8" long) for more oil volume.