Universal Adjustment ArmFeatures: This part number is for the "Arm Only", It does not come with the Belt Buddy Adjustment Mechanism; The Belt Buddy Mechanism which goes with the UAA is part number BB, grouped together the set is part number UBB; The Belt Buddy Mechanism which goes with most any adjustment arm is part number BBU; The UAA is 10.3a ^2 long and the adjustment slot provides up to 4.5a ^2 of travel. The adjustment slot is 0.53a ^2 wide; This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. - cis2:mm5mnJlm -