Cassettes with constant force coil springs
Part number: 6-C1541-1C-0-0

• Cassette made of acetal
• Spring made of Stainless Steel 304
• Available in 3 types: cassette with short tail coil, cassette with medium tail coil and cassette
  with long tail coil
• Weight range – 3 lbs to 8 lbs
• Stamped with weight for easy identification
• can stack up to 3 cassettes with coils
  on each side of the sash