18" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 17-3
18" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 17-3
Hero image 0 of 18" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 17-3, 0 of 7
WRS

18" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 17-3

|3 ratings
18" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 17-318 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 17 318 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 17 118 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 17 418 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 17 9WRS Caldwell Series 300 Block Tackle Window Balance 5 8 Channel 18 Length Stamp 17 6 18 19 99 lbs Non Tilt Side Load Replacement Hardware Heavy Duty18 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 17 2
Size:17-3 (11-14 lbs)
Actual Color:Metal

Key item features

  • ENGINEERED FOR NON-TILT WINDOWS – Designed for side-load, non-tilt window systems with a standard 5/8″ metal channel, commonly used in vinyl and aluminum single- or double-hung frames. This balance measures 18" inches in length and supports 11-14 lbs sashes. Each balance arrives pre-assembled with top and bottom guides attached, so installation is fast and frustration-free—no special tools required.
  • AVAILABLE IN LENGTHS FROM 8″ TO 49″ (3 TO 44 LB RANGE) – The Series 300 fits nearly all non-tilt window sizes, from light residential sashes to heavy commercial frames. Covers a complete range of lengths and weight ratings for versatile use. Each balance is precision-tested for smooth, reliable performance and long-term durability. Sold individually; accessories and hardware not included. Contact WRS if your exact size isn’t listed.
  • SMOOTH, SAFE & SECURE OPERATION – The Series 300’s precision pulley and spring system balances the sash to prevent slamming or sticking, keeping windows steady at any height. Designed for quiet, reliable performance in homes, schools, and offices where safety and ease of use matter every day.
  • HEAVY-DUTY GALVANIZED STEEL CONSTRUCTION – Crafted from high-strength galvanized steel for long-term durability and corrosion resistance. Precision pulleys and springs maintain smooth lift through thousands of cycles, ensuring reliable performance for years of daily use. Built tough for pros yet simple enough for DIY installation.
  • 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.
Current price is $8.23
Price when purchased online
  • Free 30-day returns

How do you want your item?

How do you want your item?
Ships to
Arrives by Wed, May 20
|
Shipping fee $7.30
Sold and shipped by Wholesale Product Supply
4.735294117647059 stars out of 5, based on 34 seller reviews(4.7)
Report an issue with this seller
Free 30-day returns

About this item

Product details

Specifications

Warranty

Customer ratings & reviews

2 out of 5 stars
stars3 ratings2 reviews
How item rating is calculated
  1. 5 stars0% (0)
  2. 4 stars33% (1)
  3. 3 stars0% (0)
  4. 2 stars0% (0)
  5. 1 star67% (2)
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-2 of 2 reviews

Nov 27, 2025
irena
Item details
Size: 17-9 (20-26 lbs)
Sold and shipped byWholesale Product Supply
1 out of 5 stars review

Verified Purchase

He sent me wrong size. I ordered size 18” and he sent me 19” long

Helpful?201NBIVFBDFL676696002
Sep 8, 2021
Scott
1 out of 5 stars review

Verified Purchase

Junk

Bought 2 1 broke in 5 days.. poor design of the routing of the string! Dont buy

Helpful?201NBIVFBDFL676696002