The speed collar is designed to attach to a Viewloader Revolution hopper. Installation will require some time, you need remove the standard VL lid, you can do that by taking all the screws out of the Revo or taking only the ones around the lid until it's loose enough to pop out.
- Speed Collar is designed to accept the JT Speed Tubes. Pull them from your pack and insert into the collar, your JT tube will open automatically. *For the player that requires the minimum amount of time reloading.
- Includes both the timer and collar.