High-Performance Telum Spiral Spring

380 – 430lbs/in – 55mm stroke, 430 – 500lbs/in – 55mm stroke, 490 – 560lbs/in – 55mm stroke, 550- 610lbs/in – 55mm stroke, 610 – 690lbs/in – 55mm stroke, 650 – 690lbs/in – 55mm stroke, 340 – 380lbs/in – 65mm stroke, 390 – 430lbs/in – 65mm stroke, 450 – 500lbs/in – 65mm stroke, 500 – 550lbs/in – 65mm strroke, 540 – 610lbs/in – 65mm stroke, 610 – 700lbs/in – 65mm stroke