Era D4 Type Spiral Balance – 15lbs to 30lbs

Product Information

These D4 Type spiral balances are light duty, economical, general purpose balances which are perfect for domestic or commercial applications with a sash weight range of 6.8kgs (15lbs) to 13.6kgs (30lbs).

They are adjustable within their weight range to suit actual glazed sash weights using a special tension adjustment tool. On how to adjust the tension of the spring see FAQ's.

Sizes

• Minimum sash weight - 6.8kgs (15lbs)
• Maximum sash weight - 13.6kg (30lbs)
• 21 lengths available ranging from 20" to 40"
• Tube diameter - 16mm
• Groove dimension - 17mm
• Supplied as pairs

Operation

These D4 Type spiral balances are light duty, economical, general purpose balances which are perfect for domestic or commercial applications with a sash weight range of 6.8kgs (15lbs) to 13.6kgs (30lbs).

They are adjustable within their weight range to suit actual glazed sash weights using a special tension adjustment tool. On how to adjust the tension of the spring see FAQ's.