WRS Amesbury Series 450 Block & Tackle Balances for Tilt Windows - 40" 3920 (15-20 lbs)
WRS Amesbury Series 450 Block & Tackle Balances for Tilt Windows - 40" 3920 (15-20 lbs)
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WRS Amesbury Series 450 Block & Tackle Balances for Tilt Windows - 40" 3920 (15-20 lbs)

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Size:3920 15–20lbs
Actual Color:Silver

Key item features

  • TILT WINDOW COMPATIBILITY – Designed for tilt-style windows, the Amesbury Series 450 provides smooth, balanced lift and secure sash control with pre-assembled clip attachments for easy tilt-in cleaning and maintenance. Compatible with vinyl, aluminum, wood, and fiberglass tilt frames and fits standard 5/8″ channels. This product measures 13" in length, stamped 1210, and supports 3-8 lbs sash weights for reliable residential and commercial performance.
  • SMOOTH TILT FUNCTION & SECURE OPERATION: Built with precision pulley-and-spring mechanics and clip attachments pre-installed, the Series 450 allows safe, easy sash tilting for cleaning or maintenance. Its reinforced design prevents slamming, sticking, and sash drop, keeping operation stable and controlled at any angle.
  • AVAILABLE IN LENGTHS FROM 13″ TO 54″ (3–40 LB RANGE): The Series 450 family offers one of the widest length and weight ranges for tilt balances. Each unit is precision-tested to ensure accurate lift and smooth tilt operation. Arrives pre-assembled with clip attachments for fast, secure installation. Sold individually; hardware not included. Contact us if your balance length or travel differs.
  • DURABLE GALVANIZED STEEL CONSTRUCTION: Constructed from heavy-gauge galvanized steel, the Series 450 resists rust, corrosion, and daily wear. Precision-calibrated pulleys and springs maintain consistent lift through thousands of open-close cycles, delivering long-term reliability for tilt windows in homes, offices, and schools.
  • 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 $23.25
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