"Angled elbows for Automags, Autococker, spyders, vm-68s and pump marker feednecks. These connect the Hopper to the Direct feed of the paintball gun are are available in various sizes for classic pumps or modern semis. Standard vl-200/Revy feedneck size is 1.040. So you will want your markers feed size by 1.040 if you're using a standard feedneck. I'm slowly checking sizes on all markers for the elbows they need. Trracer, Maverick, Tagmaster and Hornet feed necks are slightly larger than 1 inch. 1 inch is tight but it does work. So anything with 1 by X will work."