Brake chamber for semi trailer spring brake chamber booster,T24,T30,T24/24,T30/30 Brake chamber for semi trailerspring brake chamber, various size for your selection, single or double, good ... SERVICE TIME : more than ,000,000TIME, Life-time Parking Chamber ≥200,000 times MAX WORKING PRESSURE :1MPAClevis pin: 12.7X14 ... or As per Client requiredLoading Port: China Port Brake chamber for semi trailer