10SI*,12SI,15SI,17SI,19SI,21SI,27SI*; Early CS144 - 17.3mm ID x 30mm OD; used with Late Style Rotors having 17.3mm Slip Ring Knurl (7127, 7134, 7137, 7150, 7152, 7176, 7178, 7181, 7186, 7191, 7192, 7198, 7239, 7272, 7273, 7275, 7277, 7278, 7279, 7287, 7288, 7290, 7291, 7292, 7294, 7641, 7660, 7662, 7666, 7670, 7673, 7805, 7806, 7812, 7830, 7854, 7863, 7864, 7901, 7904, 7918, 7934, 7942, 7976, 8037)