This is a pair of 75.5gf/mm 70mm M Shock Springs for the Arrma Typhon. FEATURES Steel construction 75.5gf/mm compression rate-the higher the number is, the stiffer the spring is under compression INCLUDES Two 75.5gf/mm 70mm M Shock Springs SPECIFICATIONS Length: 2.7 (70mm) Compression Rate: 75.5gf/mm