- Fully sealed construction, weight range 7.25 - 10kg
- 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 400 suits timber or aluminium double-hung windows and is supplied with the standard foot attached. It assists the smooth sliding operation of both top and bottom sashes, with spring tension adjustable to suit the application. It has shock-absorbing stops and a corrosion-resistant stainless steel sash foot plate.