Middle Atlantic S3 Three-Space Large Perforated Rackmount Security Panel3 sp. (5 1 4) regular perf. pattern. Eliminate the prospect of any tampering with these tough security covers. Offered in large or fine perforation styles (models S and SF respectively), each cover is 1" deep. Includes installed rubber edging that won't mar the equipment you're trying to protect. To enhance the level of security, use our security rack screws.