Halex 62899 Miscellaneous Accessories, 1 X 2 1/2", Silver 1-1/2-inch by 2-1/2-inch Indoor use only Zinc plated steel 50 Pieces per box For indoors only Use to protect internal wire runs from nail punctures, as defined in the NEC Article 300-4 Steel 1-1/2-Inch x 2-1/2-Inch trade size and dimensions 50 per box