Liftmaster LA400 / LA400DC / LA400DCS Replacement Arm Only - Swing Gate Opener
Liftmaster LA400 Primary Unit or LA400DCS Secondary Unit - Arm Only. SMOOTH START/STOP OPERATION AND MID-TRAVEL REVERSAL EXTEND HARDWARE LIFE OF THE GATE AND OPERATOR. GATE TRAVEL SPEED Opens 90° in 15–17 Seconds.