---
product_id: 1211401
title: "Estes 2231 Fin Alignment Guide Model Kit , Color Varies"
price: "R$488"
currency: BRL
in_stock: true
url: https://www.desertcart.com.br/products/1211401-estes-2231-fin-alignment-guide-model-kit-color-varies
store_origin: BR
region: Brazil
---

# Supports 3/32" & 1/8" fin thickness Fits BT-20 to BT-80 tubes Holds 3 or 4 fins securely Estes 2231 Fin Alignment Guide Model Kit , Color Varies

**Price:** R$488
**Availability:** ✅ In Stock

## Summary

> 🚀 Nail your rocket’s fins like a pro—because precision is the new cool!

## Quick Answers

- **What is this?** Estes 2231 Fin Alignment Guide Model Kit , Color Varies
- **How much does it cost?** R$488 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/1211401-estes-2231-fin-alignment-guide-model-kit-color-varies)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted STEM Legacy:** From Estes, inspiring rocketeers since 1958 with quality and safety.
- • **Streamlined Build Process:** Holds fins steady while adhesive dries—no more awkward hand-holding.
- • **Precision Perfect Alignment:** Eliminate guesswork with exact fin placement every time.
- • **Versatile Fin Compatibility:** Works seamlessly with balsa, basswood, or plywood fins in two thicknesses.
- • **Universal Fit for Rocket Builders:** Compatible with a wide range of body tubes from BT-20 to BT-80.

## Overview

The Estes 2231 Fin Alignment Guide is a precision tool designed for model rocket enthusiasts seeking flawless fin placement. Compatible with body tubes ranging from BT-20 to BT-80 and fin thicknesses of 3/32" or 1/8", it securely holds three or four fins made of balsa, basswood, or plywood. This accessory streamlines the building process by ensuring fast, accurate alignment, reducing errors and enhancing rocket performance. Backed by Estes’ decades-long STEM heritage and a 1-year warranty, it’s a must-have for serious hobbyists aiming for professional-grade results.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004LGXCLI |
| Additional Features | Fast & accurate fin alignment, Suitable for three or four finned rockets |
| Age Range (Description) | Kid |
| Age Range Description | Kid |
| Art Craft Kit Type | Model Rocketry |
| Brand | Estes |
| Brand Name | Estes |
| Color | Assorted |
| Customer Reviews | 4.5 out of 5 stars 1,633 Reviews |
| Global Trade Identification Number | 00047776022317 |
| Included Components | SUPPLIES.SCIENCE EDUCATION.MODELS.ROCKETS/ACCESSORIES |
| Item Dimensions | 12 x 3 x 6 inches |
| Item Type Name | Model Rockets |
| Item Weight | 0.25 Pounds |
| Item dimensions L x W x H | 12 x 3 x 6 inches |
| Manufacturer | Estes |
| Manufacturer Part Number | 2231 |
| Material | Plastic |
| Material Type | Plastic |
| Model Name | Fin Alignment Guide |
| Model Number | 2231 |
| Number of Pieces | 1 |
| Seasons | All Seasons |
| Size | Medium |
| Subject Character | (-) |
| Theme | Model Rocket Kit |
| UPC | 047776022317 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 Year Warranty Against Manufacturer Defects |

## Product Details

- **Age Range (Description):** Kid
- **Brand:** Estes
- **Color:** Assorted
- **Item dimensions L x W x H:** 12 x 3 x 6 inches
- **Theme:** Model Rocket Kit

## Images

![Estes 2231 Fin Alignment Guide Model Kit , Color Varies - Image 1](https://m.media-amazon.com/images/I/51y2NuFwtNL.jpg)

## Questions & Answers

**Q: The standard center post does not fit over the top of either of the mini posts. All other fits good. I have sanded both over 30 minutes. Replace?**
A: The standard center tube is the same size as A, B or C rocket engine. Sanding it for 30 minutes is much to long to make it fit.  Used a used engine after you clean it out

**Q: Is there any way to use this to set fins that are up higher on the body, and not at the very bottom?**
A: It depends on how high on the body they are. I've used this to set fins that are four inches or more above the base of the rocket, but those had a pretty big angle so I was able to clamp part of the fin very high on the plastic. 
I use a piece of wood from the sheet the fins are cut out of as a height guide so I get them all the same.

If it's really high, you might be able to turn the rocket body and find upside-down and attach them that way (too far from the bottom could be close enough to the top of the body).

**Q: Does Estes sell the fins separately? I can't seem to find just fins.**
A: Call Estes Customer Service 800 number and ask can they send it to you. Go to the website and find the contact us link

**Q: Can the fins be glued at an angle to induce spin?**
A: The Estes PN 2231 Fin Alignment Guide is designed to only align fins vertically on the body tube. No provision was ever make to alter fin alignment as this would require flight testing of all Estes rockets to support that angling fins was OK to do on all products as it could potentially decrease the altitude performance on all products. Additionally, we do not and would not support the idea of angling fins on any Estes rocket unless that product was specifically designed to spin during launch, like PN 7258 Space Twister.
The Estes Team

## Frequently Bought Together

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-06-04*