Estes 2231 Fin Alignment Guide – Adjustable Model Rocket Fin Gluing Jig for BT-20 to BT-80 Body Tubes The Rigol DP821A features a

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High carbon steel construction offers long lasting durability

Estes 2231 Fin Alignment Guide – Adjustable Model Rocket Fin Gluing Jig for BT-20 to BT-80 Body Tubes The Rigol DP821A features aFast & accurate fin alignment for three or four finned rockets Fits body tubes ranging from BT 20 to BT 80 Can accommodate either 3 32 in. or 1 8 in. balsa, bass, or plywood fins Easy to follow instructions are included No more guessing where your balsa fins go, this guide does it all for you! NOTE: Color may vary. Body tubes and wood not included. A precision molded accessory that makes it easy to glue three or four fins to various sized body tubes