Estes 3159 D & E Engine Mount Kit, 24mm Motor Mount Parts – Fits BT-55, BT-60 & BT-80 Model Rocket Tubes 4140A is a flux cleaner

4140A is a flux cleaner that cleans post-solder residues quickly and conveniently

Center Positive Polarity

With features not available in most oscilloscopes at twice this price

DSA1000A Series Spectrum Analyzer

Estes 3159 D & E Engine Mount Kit, 24mm Motor Mount Parts – Fits BT-55, BT-60 & BT-80 Model Rocket Tubes 4140A is a flux cleanerHeavy duty engine mounts for the D and E engines Contains enough parts to mount two engines Contains all the component parts for mounting one or two 24 mm D and E engines in BT 55, 60 and 80 body tubes. Includes 19 individual parts: 30052 Large Diameter Laser Cut Centering Ring (qty. 1) This BT 80 body tube centering ring set is laser cut from heavy duty cardstock and allows the model rocket builder the option to insert a single 4 in., BT 50 motor