The Haldex LifeSeal+ Spring Brake is a completely sealed diaphragm spring brake. A sealed chamber helps prevent contaminants from reaching the power spring. Key benefits include four different size/stroke combinations, three different application-specific features, welded clevis pushrod assemblies, heavy duty/vocational grade, oversized 3/4" thread pushrods and standard and bulk package options. The heat treated power spring is designed for improved force output consistency and superior fatigue life. The custom design EPM guide bearing and o-ring provide a long lasting and air-tight seal. The brake includes a six-year, unlimited mileage warranty.