Rubber Grommet For Electrical Panel Box Knockouts. These will protect your wires.

Specs:

Inside Diameter: 1/2"

Groove Width: 1/8"

Groove Diameter: 3/4"

Outside Diameter: 1"

Thickness: 1/2"

Can be used to seal holes, on pvc pipes, protect wires from sharp objects and many other uses. Durometer hardness - 60 Can be used indoors or outdoors.

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