Below is a list of all of the Semroc model rockets that are compatible with Estes' new "Mini Engine Launch System" (002464, see: http://www3.towerhobbies.com/cgi-bi...p?&I=LXBGNP&P=7 ) that includes the Mini Launch Pad. (It can also handle some 18 mm rockets [up to 16" long, 1" diameter, 1.5 oz. net weight], see: http://www.ninfinger.org/rockets/no...a/88est006.html ). Semroc's kits that are compatible with the Estes Mini Launch Pad are: