This item includes 1 x Automatic Slack Adjuster – ASA-40010211 Arm Length – 5.5" Number of Splines - 28 Spline Diameter - 1.50" Replacement Numbers - 61035, 74322, 214617, 808138, 808175, 811120, 811121, 813638, 813648, 818141, 3946257, 6450582, 6450883, 10005708, 10600166, 10600168, 40010211, 40500501, 40501307, 40501313, 41420211, 52125033, 119100115, 203873105, 6814205438, 020-32570, 03-0150-0-033, 10-400-10211, 10-4NL-10211, 1697569C91, 17-A23-117, 17-A23-137, 17-A23-146, 3-0150-031, 400-10211, 409-10236, 409-10237, 409-10386, 409-10398, 409-10399, 409-10430, 409-10471, 409-10683, 409-10686, 409-10979, 429-10683 Replacement Numbers - 4NL-10211, 4W8035, 500-10211, 509-10236, 509-10237, 509-10398, 509-10471, 509-10683, 529-10683, 609-10236, 609-10237, 609-10386, 609-10398, 609-10399, 609-10430, 609-10471, 609-10683, 709-10683, 78468-26, 9002-0005, 9002-0006, 93-1870-5, A13275E1071, A-14805, A28SJS00546, AB22-76, A-CE8518-8, A-NB3294-2, ASA178, AXL0000006, E-6944, FLT40010211, H0055077, H0055207, HSA-5043, K08557, L3609, OTR10211, P08557, PNA-504, PNA-547, PO8557, R806019, RB-10211, SA10211, WA10211 US stock