【The 2nd Generation】: 1: 800g up to 1000g. 2: Now you don’t have to adjust anymore. 3: Adopting upgraded double steel wire rope to make it more durable than others. 4: This 2nd Generation door closer, more convenient, more secure.【1000G Pull and 80,000 Tests】: The high-quality double steel wire rope with diameter of 1.2mm has passed 80,000 times of tensile test and rebound test with strong 1000G Pull (100N)【Suitable for more scenarios】: For the 1000g upgraded, now it is more stable and suitable for screen doors, invisible doors, iron door, security doors, aluminum alloy glass doors, interior doors, sliding double doors, office doors, doors that open left and right, kitchen door, bathroom doors, wooden and metal doors, residential and commercial doors, exterior/inner door closers, fire doors.