WRS
WRS Amesbury Series 400 Block & Tackle Window Balance – 22″ Length, Stamp 2130 (12-15 lbs), 5/8″ Channel, Non-Tilt Side-Load Replacement Hardware – Heavy-Duty Design for Residential & Commercial
*Price sourced from Amazon.com. Last updated 2026-05-12. Price and availability subject to change.
SpecPicks Verdict
SpecPicks classifies WRS Amesbury Series 400 Block & Tackle Window Balance – 22″ Length, S… as a solid pick with broad community endorsement in the retro software & media category, based on 19 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. WRS's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for retro software & media of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Solid 4.3★ customer rating
- ✓ Backed by WRS's warranty and support channels
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Limited review volume so far — fewer data points on long-term reliability
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- ENGINEERED FOR HEAVY-DUTY NON-TILT WINDOWS: The Amesbury Series 400 delivers superior load capacity and strength for non-tilt, side-load windows. Compatible with vinyl, aluminum, wood, and fiberglass frames, it fits most standard 5/8″ channels. This product measures 22″ in length, stamped 2130 and supports (12-15 lbs) lbs sashes. Designed for replacement and new installations, it ensures smooth, stable operation even in heavier window systems.
- HEAVY-DUTY PERFORMANCE & PRECISION: Built for demanding residential and commercial applications, the Series 400 features reinforced pulleys and springs for enhanced lifting power and smoother motion. Its premium Amesbury engineering provides greater weight support and long-lasting balance performance than standard models.
- DURABLE CONSTRUCTION & READY TO INSTALL: Constructed from heavy-gauge galvanized steel, the Series 400 resists rust, corrosion, and bending that cause cheaper balances to fail. Reinforced pulleys and precision springs maintain smooth lift through thousands of open-close cycles, keeping windows operating like new for years.
- AVAILABLE IN LENGTHS FROM 10″ TO 55″ (3–65 LB RANGE): The Series 400 family offers one of the widest size and weight ranges in its class. Each balance is precision-tested for reliable lift and long-term durability—from light residential sashes to heavy commercial frames. Pre-assembled with non-winged top and bottom guides for quick, secure installation. Sold individually; accessories not included.
- TRUSTED SINCE 1989 – WRS Window Repair Systems has over 30 years of experience supplying reliable, high-quality hardware. Trusted nationwide by homeowners, contractors, schools, and property managers for dependable repairs and long-lasting performance.
Full Specifications
| Size | 2130 (12-15 lbs) |
|---|---|
| Brand | WRS |
| Color | Silver |
| Style | American |
| Weight | 65 lb |
| Part Number | 05-40021-3 |
| Batteries Included? | No |
| Batteries Required? | No |
| Item Package Quantity | 1 |
Ready to buy?
WRS Amesbury Series 400 Block & Tackle Window Balance – 22″ Length, Stamp 2130 (12-15 lbs), 5/8″ Channel, Non-Tilt Side-Load Replacement Hardware – Heavy-Duty Design for Residential & Commercial is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-12. Price and availability subject to change.
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