Check the listing for details. Inception Designs PWR Single Insert 0.685 - Eclipse S63 - Barrel Paintball. Condition: New. Listed at 24.99 USD. Item is a single insert for the PWR barrel insert system from PE and Inception. These PWR Inserts work with barrels from Planet Eclipse and Inception Designs that are designed for PWR Inserts. They do not work with other insert barrel systems from other companies.The new system uses specially designed inserts that maintain all the easy ball entry features of the Stella barrel backs. The design of these new PWR inserts is different to those you are previously familiar with. They are a very close tolerance to the barrel back, and yet can still be removed easily. The muzzle end has an external chamfer to promote the best alignment with the barrel front possible. They have an internal chamfer and radius ball entry lip, not a sharp edge, so are super gentle on the paint. They are marked with bore sizes that can be easily seen without removing the insert from the barrel back (and can also be identified by the color as seen through the rearmost ports on our barrel front). The inserts are easily gripped and removed from the barrel back. Shipped USPS first class.