Self-Adjusting Tensioner, Arm Rotation 45 Degrees , For Chain Number Not Applicable, For V-Belt Size A, Pulley Outside Diameter 3 in, Maximum Tension Force 30 lbf, Arm Material Aluminum, Base Diameter 2.76 in, Features Alloy Steel Compression Springs, Self-Adjusting Tensioner Eliminates Need for Regular Manual Retensioning, Includes -, Minimum Tension Force 0 lbf, Mount Hole Diameter 13/32 in, Overall Depth 1.67 in, Overall Length 6.39 in, Product Type Rotary Tensioner & Idler Pulley Assembly