Set of 2 Springs: Includes two rooflight springs for reliable replacement and maintenance of roof windows. Compatibility: Compatible with Dometic Seitz Midi Heki rooflight systems, ensuring precise fit and function. Accurate Dimensions: Total length 45mm, spring coil length 28mm, diameter 11mm for exact performance. Durable Steel: Made from strong spring steel for excellent resilience and long-lasting durability. Easy Replacement: Simple installation restores smooth operation of rooflight opening and closing mechanisms., Manufacturer: YINETTECH