Key Features:Shimano compatible, sealed,Including suitable calibration sockets ,A: 8, 9, 10, 11 times Shimano,B: 7-speed Shimano & 8-speed Campagnolo ,C: Campagnolo 9-10 times ,D: Sram 9.0 ('97 / '98), 9.0 SL ('98), 7.0 ('97 / '98 / '99).
