- Fully sealed construction, weight range: 2.25 - 7.25kg
- Oil tempered carbon steel torsion spring and zinc plated variable pitch spiral
- Steel zinc diecast fixing plug and tough ABS polymer outer casing
The Whitco Window Spiral Balance 340 suits timber or aluminium double-hung windows and is supplied with the standard foot attached. Its spring and spiral work together for smooth, balanced sash movement, with tension adjustable to suit the application. Shock-absorbing stops are built in.