Estes 2231 Fin Alignment Guide for 3 or 4 Finned Model Rockets (COLOR MAY VARY)

Science Purchase
(18817)
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US $24.99
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Condition:
New
More than 10 available68 sold
Breathe easy. Returns accepted.
This one's trending. 68 have already sold.
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Located in: Rahway, NJ, United States
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Estimated between Tue, Dec 9 and Fri, Dec 12 to 94104
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eBay item number:124099913601
Last updated on Dec 05, 2025 19:02:03 PSTView all revisionsView all revisions

Item specifics

Condition
New: A brand-new, unused, unopened, undamaged item (including handmade items). See the seller's ...
Brand
Estes
Type
Building Tools
MPN
2231
UPC
047776022317
Category

Item description from the seller

About this seller

Science Purchase

99.4% positive feedback•64K items sold

Joined Sep 2015
SciencePurchase.com is a division of RSR Electronics, Inc./Electronix Express. Founded in 1977, RSR Electronics, Inc has over 38 successful years of experience distributing electronic components and ...
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.9
Reasonable shipping cost
5.0
Shipping speed
5.0
Communication
5.0

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Seller feedback (20,218)

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  • e***s (12)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Exactly as expected and arrived in good time. BONUS: comes in a variety of colors - and the shipped item is YELLOW, his favorite color. Thank you!
  • 6***n (444)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    As discribed, fast shipping.
  • f***r (96)- Feedback left by buyer.
    More than a year ago
    Verified purchase
    I have used the Fin Guide on 4 different rocket projects recently and I trust it will cause the rockets to fly straight up!! The first rocket photo shows repairs on a Phoenix Air to Air Missile that was in storage for over 30 years. It flew well after the repairs! The second Fin Guide pic is of a Super Big Bertha build the week of 7 14 24
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Product ratings and reviews

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4.5
42 product ratings
  • 28 users rated this 5 out of 5 stars
  • 10 users rated this 4 out of 5 stars
  • 3 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 1 users rated this 1 out of 5 stars

Would recommend

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Most relevant reviews

See all 30 reviews
  • by groupracer
    May 21, 2019Top favorable review

    its ok, best for beginners who have nothing.

    pros: helps with aligning fins, easy to use cons: not exact alignment, only can do 3/32 and 1/8 fins, clips not tight enough. base can warp and must be screwed down. there are holes provided for permanent fixturing

    Verified purchase: YesCondition: NewSold by: sciencepurchase

  • by tonyb_29
    Jul 12, 2021Top critical review

    poor design pooriy suited and ill-fitting materials, a real rip off

    The parts do not go together easily, particularly the paper tubes. Some are too tight, some too loose. And the design is poor because glue drips down and glues the sliders to the base. In addition, there were no instructions whatsoever, Overall, it is a very sloppy imprecise jig which created more problems than it solved. The only way it can be fixed is to machine some precision parts and find some manner to prevent glue from dripping down to ruin the jig after its first use, I think they need to provide some cheap plastic sheeting strips which are like masking tape with mild adhesive to protect the base from being rendered useless with dripping glue. I would also recommend they mold some plastic rods which slide together easily!

    Verified purchase: YesCondition: NewSold by: mobileoutlet1

  • by lord-howard-hurts
    May 14, 2017

    Alignment Jig.....

    Great little tool for just about any size rocket requiring correct alignment of fins. Easy to use and it actually works really well. If you are a first time builder this is one of the top most have tools in your building box.

    Verified purchase: YesCondition: NewSold by: omnimodels

  • by foursquaresound
    Jul 18, 2018

    Simplifies the process and gives more accuracy!

    Even in junior high school science class, I was already and advanced model builder who was not satisfied with putting straight cut balsa fins on a cardboard tube and calling it a rocket. I always carefully rounded the leading edge of the fins, and brought the training edge to a point, and then carefully glued each one to the body, letting the glue dry on each, before stating on the the next. I have no idea why I waited until I was 52, with grandkids in middle school before buying one of these! It speeds up the process, and gives us better alignment. We still have to carefully make a fillet of glue after they dry (to increase stability, aerodynamics, and strength), but we had to do that anyway. I think that picking up rocketry again, was about one of the best things I could have done with ...

    Verified purchase: YesCondition: NewSold by: mamalauras

  • by scrobct
    Oct 26, 2016

    well recommended

    I haven't gotten around to using it yet, but ebay doesn't understand that. so my review is going to be vague. I'm not sure how much longer I have to type so that I can submit the review.

    Verified purchase: YesCondition: NewSold by: omnimodels

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