Up for auction on Rocketryonline.com is a partial Robby's Rockets L.E.S. kit #1146 - This is a reuseable ejection system which can be used again and again. The reuseable casing is made from 5/8: OD aluminum bar stock. It is 2" long and will hold charges from 0.25 grams to 3.0 grams. Please see my other auctions. Thanks.