21" RUBBER STRAP with end hooks for hanging blowers/squirrel cage fans. Absorbs the vibration for very quiet operation.The easiest way to quiet a blower is not to mount it to a solid surface or structure like a wall. The vibration makes noise and the solid surface amplifies it like a speaker. Hang the blowers or fans from these sound and vibration dampening straps. Your blower will be 100% quieter or your money back! Holes should be drilled into the blowers housing at the blowers balance points. Slip the straps hook through them and hang it for vibration free air movement. It may take up to three straps for a proper hanging. Buy three, they're inexpensive.