45" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 44-1
45" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 44-1
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WRS

45" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 44-1

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45" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 44-145 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 44 145 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 44 345 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 44 545 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 44 445 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 44 9

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 45" inches in length and supports 9-14 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.
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