Durable with alloy steel material, strong mounting and easy to install.This mounting is manufactured by integral forming of 3mm steel plate and welds fixed bar on each side of the holder, strong and tough.Mounting Holes: The distance from the center of the hole to the ground is 39mm, all slotted and holes openings are made of high-precision punch press once stamping, ensureing that absolutely the dimensions are absolutely accurate and precise, and with the motor fit tightly.Our motor fixed adopts advanced anti-rust paint technique, which makes the be used for a long-term.90 Degrees L shape mounting .Max Collar Diameter: 38mmcolour: blackMaterial: alloy steelsize: 57mmPackage Contents: 4 * mounting 16 * Mounting ScrewsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.