M1E1.8, Min Diam Retainer Extension, 5/16 Stud, 1.8-2.2"L

Min Diam Retainer Extension, 5/16 Stud, 1.8-2.2" Length For 38mm & 54mm Minimum Diameter Retainers Allows Use Of Shorter Length Motors Adjustable Length From 1.8-2.2 Inches Precision Machined 6061-T6 Aluminum With Mil-Spec Type II Red Anodizing 5/16-18 Stainless Steel Stud & 2 Stainless Steel Jam Nuts Attaches To Motors Forward Closure Just Slide Motor In And Screw Extension Onto Retainers Stud Mount, That`s It! (Aeropack)