3M BLACK DUAL LOCK TYPE 400 WITH RUBBER ADHESIVE. TYPE 400 MEANS THERE ARE 400 SMALL PRONGS PER SQUARE INCH. BESIDES SICKING TO ITSELF, IT ALSO MATES WITH TYPE 150 AND TYPE 250 DUAL LOCK AND FOR SEMI-PERMANENT APPLICATIONS THE "LOOP" PART OF VELCRO AS WELL.
3M BLACK DUAL LOCK TYPE 400 WITH RUBBER ADHESIVE. TYPE 400 MEANS THERE ARE 400 SMALL PRONGS PER SQUARE INCH. BESIDES SICKING TO ITSELF, IT ALSO MATES WITH TYPE 150 AND TYPE 250 DUAL LOCK AND FOR SEMI-PERMANENT APPLICATIONS THE "LOOP" PART OF VELCRO AS WELL.
3M BLACK DUAL LOCK TYPE 250 WITH RUBBER ADHESIVE. TYPE 250 MEANS THERE ARE 250 SMALL PRONGS PER SQUARE INCH. BESIDES SICKING TO ITSELF, IT ALSO MATES WITH TYPE 150 AND TYPE 400 DUAL LOCK AND FOR SEMI-PERMANENT APPLICATIONS THE "LOOP" PART OF VELCRO AS WELL.
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