Its as simple as a roll of tape, 33 meters of 19mm wide black pvc adhesive tape. For the technically minded it also performs to BS 3924 approved - SCAPA 2702.
Sold in a pack of 3 rolls for just £3. Please note that there is a £3.50 postage charge, we dont recomend buying this product on its own!

Price £3 for 3 rolls.