3M(TM) Metalized Polyester Tape 630 Silver, 1 x 36 yd 3.7 mil, 36 per case 3M(TM) Metalized Polyester Tape 630 Silver, 3.7 mil (0.09 mm) metalized polyester film tape with rubber adhesive. 3M(TM) Metalized Polyester Tape 630, high tack rubber adhesive ideal for applications where reflectivity is desired. Excellent for splice detection and can be used for applications requiring a conductive surface.