We are manufacture We can produce different models of spring brake chambers,such as T24/30,T24/24,T30/30. OEM ... are welcomed.We can produce different models of spring brake chambers such as T30/30, T24/24,and T24/30 ... , and service brake chambers, such as T9, T12, T16, T20, T24, T30, T36 ... : 0 - 76mm4) Ambient temperature: - 40 ~ +80°C 5) Leading Standard: SAE J1463-95