RollArounds Instant Wheels, Self-Adhesive, 250 lbs/Set, Black, 4/Set (18137) Unique patented mounting options make Instant Wheels the first, universal wheel of it's kind. Set of four steel-reinforced mounting brackets hold up to 250 lbs. Flexible panels mount flat, angled or u-shaped. Industrial grade, high-strength adhesive is specially formulated to bond tight and hold permanently. Attaches securely to most smooth surfaces. Black. 4/Set.