Aluminum Thresholds This flexible answer to surface protection can be used on door thresholds, trim and hardware, plus window frames, fixtures and glass to prevent needless dirt, scratches and abrasions. UV-treated, tough-skinned 6-mil. poly-vinyl tape will stand up to traffic, dirt and even helps prevent water damage. No adhesive residue.   Aluminum Threshold Protection Model: PT6B-4 2@ 4” x 36 yds.-6 mil, 6 lbs. Use several layers.. $21.00 Quantity: 1 2 3 4 5 6 7 8 9 10    Discount Price of $20.00 ea. for orders of 6 or more!   Aluminum Threshold Protection Model: PT6B-6 2@ 6” x 36 yds.-6 mil, 8 lbs. Use several layers.. $21.00 Quantity: 1 2 3 4 5 6 7 8 9 10    Discount Price of $20.00 ea. for orders of 6 or more!