Take the guesswork out of rocket building with the Ultimate Tube Marking Guide™.

This precision tool helps you create straight, consistent guide lines for fin and launch lug placement so every build starts with confidence.

Whether you are building your very first rocket or refining a custom project, this 18 inch marking guide delivers professional results fast.

Cleaner alignment means better stability, smoother flights, and rockets that look as good as they fly.

Precision Alignment: Ensures straight, consistent fin and launch lug placement every time Universal Fit: Designed to work with all Estes body tubes from mini to large diameters Heavy Duty Design: Rigid 18 inch length supports accurate marking across long tubes Faster Builds: Eliminates measuring errors and speeds up rocket assembly Built to Last: Durable plastic construction made for repeated use