The Estes' Rocket Builder's Marking Guide is an easy way to locate fin placement lines on your body tube. Fits BT-5 to BT-80 body tubes. Marks 3 fin and 4 fin configurations. Also includes a fin gluing jig. This is the best tool in the market for placing a line around the perimeter of a body tube before cutting it. Fine complement to the Heavenly Hobbies Body Tube Marking Tools!
Related item: Heavenly Hobbies Alum BT Marking Tools
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