KIT, SPRING CARTRIDGE close Quantity in Basket: None Code: HWR-11144 Price: $23.55 Shipping Weight: 0.43 pounds Quantity: SPRING CARTRIDGE KIT Converts the following hinges to spring assistedHWR-11146, HWR-11147, HWR-11148, HWR-11149, HWR-11150, HWR-11151, HWR-11152 Gives extra closing power Installation instructions included Standard Keil no. 2862