Choose between an advanced or performance series kit. 29mmt or 38mmt depending on field and ability. The 29mmt is an advanced series kit, which feature factory pre-slotted airframe and through-the-wall fin construction, the BBX is our sport scale version of the famous Black Brandt rocket. The 29mm motor mount is perfect for F and G motors and the rugged airframe can take I power if you can handle it. Parachute Recovery. The 38mmt version is great as a stand alone kit or ready to be married to our 3" Terrier Booster. DESCRIPTION Complexity: 29MM Intermediate - 38MM AdvancedDiameter: 2.26″Height: 61″Weight: 21ozMotor Mount: 38MM (Performance Series) or 29MM (Advanced Series)Parachute Size: 28″ Ripstop Nylon (Performance Series) 24" Parachute (Adbanced Series)Shock Cord Type: 15′ 3/16" Tubular Nylon (Performance Series) 12' Tubular (Advanced Series)Shock Cord Mount: Screw Eye Bolt / SCM1Fin Thickness: 1/8″Ring Thickness: 1/4″(Performance Series) 1/8" (Advanced Series)1010 Rail Buttons and 6x6 Fire Resistant Blanket includedInstructions: YBBX238-Instructions YBBX238 Rocksim SERIES SELECT 29mm motor mount Advanced Series: One of the ADVANCED SERIES of kits, which feature factory pre-slotted airframe and through-the-wall fin construction, the BBX is our sport scale version of the famous Black Brandt rocket The 29mm motor mount is perfect for F and G motors and the rugged airframe can take I power if you can handle it. Parachute Recovery. All LOC/PRECISION “PK-XX” kits include heavy duty airframe and motor mount tubes, high-grade precision-cut plywood fins, centering rings, rip-stop nylon parachute or streamer, Kevlar shock cord and mount, launch lug, polypropylene nose cones and instructions. 38mm motor mount Performance Series: With a 38mmt this is our performance series version of the kit which includes Nylon recovery and loops sewn in. Quick links and eye bolts for secure recovery connections. Also ready to accept the new 3″ Terrier Booster.