20in 40lb Universal Gas Strut Pair GSNI-5300-40 SL34-40 - RV Hatch

In this review the 20in 40lb universal gas strut pair is evaluated for use on RV doors, camper shells and a range of DIY lift lids. The bottom line: these two gas springs are best for owners who need a direct replacement with predictable lift force and simple installation. They arrive as a matched set with mounting brackets and screws, so the biggest reason to buy is convenience-matching strength to common OEM interchange numbers while saving a trip to a parts shop.

Key Features

• Direct replacement compatibility: Fits many OEM interchange numbers so users can match their original cylinder without guessing.
• Matched pair with brackets: Supplied with 2 L-brackets, 2 flat-bottom brackets and 16 screws for multi-purpose mounting and straightforward installation.
• Consistent 40lb force: Each gas spring provides 40lb (178N) of lift force which is suitable for light to medium weight RV doors and lids.
• 20in extended length: The measured 20in extended length makes measuring and replacing old struts simple when paired with the weight rating.
• Easy install: Installation requires only common tools and a flat head screwdriver for the included brackets and ball stud mounts.
• Aftercare service: The brand offers 24-hour email support and a 15-month exchange policy for added peace of mind.

Who It's For

This set is aimed at RV and trailer owners who need a quick, like-for-like replacement for compartment doors, entry storage doors or lightweight bed supports. It also suits DIYers building food truck windows, wooden box lids or shed access doors who can match pound force and length to their application.

Those who need heavy duty or precision-engineered industrial struts should look elsewhere, and users who cannot confirm their original cylinder part number or exact extended length may prefer to measure their existing struts before ordering.

Pros & Cons

Pros

• Convenience of a matched pair with multiple mounting brackets and screws included.
• Good fit and quality for typical RV doors and light lids, with several customers reporting ease of installation.
• Clear compatibility list that helps match OEM interchange numbers and avoid mistakes.

Cons

• Limited to a 40lb force and 20in length, so not suitable for heavier applications without verifying requirements.

Specifications

Product type	Gas strut pair with mounting brackets
Extended length	20.00 in
Force	40 lb (178N) each
Included hardware	2 L-brackets, 2 flat-bottom brackets, 16 screws
Compatible part numbers	ML14-40, SL34-40, GSNI-5300-40 and others
Intended uses	RV doors, compartment lids, camper shell toppers, DIY lift lids
Support	24-hour email and 15-month exchange service

Our Verdict

The 20in 40lb gas strut pair is a practical, cost-effective option for replacing RV hatch supports and similar light to medium lift applications. It delivers reliable lift, arrives with mounting hardware for a quick swap, and is backed by responsive aftercare, making it a sensible buy for owners who confirm their OEM part numbers and length first.

Frequently Asked Questions

How do I ensure compatibility?
Compare the pound force and extended length of your original cylinder and match any OEM interchange number listed to ensure a correct fit.

What hardware is included?
The set includes two gas struts, two L-brackets, two flat-bottom brackets and 16 screws for mounting.

Can these support heavy lids?
They provide 40lb of force each and suit light to medium lids; heavier lids will need higher force struts.