The new and improved Studio Tower Arm Spring has been redesigned with a swivel end for a greater range of movement and mobility and improved tension. Sold individually. For use on the Peak Pilates® Studio Wood Line. Length: 18.75" Click here to view the Peak Pilates® Spring Chart (detailed information on all equipment and required springs). 1-year warranty We recommend that you replace each spring every two years. Any spring that exhibits early signs of fatigue (for example, separation in coils, even if slight) should be replaced immediately.Refer to your equipment owner's manual. Clips are sold seprately. Standard tension only. Note: Tower arm springs are also used as roll down bar springs Peak Pilates® Studio Wood Line Springs — text table Peak Pilates® Studio Wood Line Springs Equipment Studio Reformer Spring, Light (Blue)Item # 4911-3605 Studio Reformer Spring, Standard (Yellow)Item # 4911-3604 Studio Reformer Spring, Heavy (Red)Item # 4911-3603 Studio Tower Leg Spring, StandardItem # 4911-3621 R1 Studio Tower Arm SpringItem # 4911-3623 R1 Studio Tower Push-Through SpringItem # 4911-3626 Studio Chair & Trapeze SpringItem # 4911-3651 Artistry™ with Rope 2 2 1 Not specified Not specified Not specified Not specified Artistry™ with Vegan Straps Not specified Not specified Not specified Not specified Not specified Not specified Not specified Artistry™ FWS 2 2 1 2 2 2 Not specified Artistry™ TWS 2 2 1 2 2 2 Not specified Classic Cadillac Not specified Not specified Not specified 2 2 2 2 Premier Cadillac Not specified Not specified Not specified 2 2 2 2 Artistry™ Convertible 2 2 1 2 2 2 2 Low Chair Not specified Not specified Not specified Not specified Not specified Not specified 2 High/Low Combo Chair Not specified Not specified Not specified Not specified Not specified Not specified 2 Ped-O-Pull Not specified Not specified Not specified Not specified 2 Not specified Not specified These springs are included with the purchase of your apparatus. “Not specified” indicates a blank cell in the original chart.