Harken Midrange End Controls Midrange End Controls Harken® Midrange traveler controls allow installation of 2:1 to 4:1 purchases. Assemblies secure to the track eliminating additional holes. Tough one-piece bases and cam arms are machined from a single piece of aluminum. Compact, high-strength Carbo AirBlock® components combined with a Carbo-Cam® cleats keep traveler weight minimal. For angled cleating, install the 380 X-Treme Angle Fairlead. Use 1620 double-sheave ESP end controls for cabintop travelers where lines lead to the aft edge of the cabintop. Use the 1623 car control for a 3:1 purchase, the 1845 for a 4:1 purchase. Use standard length 1618 track. Ends must be anodized. Contact Harken® to order special track with mounting holes for 1620 end controls. Allow five weeks.