Roll of 50 Yards. Our Vehicle Conspicuity Tape meets NHTSA's rule under 49 CFR, Part 571 for enhanced visibility and detection and is available in roll form or in prepackaged kits (each kit contains enough material to mark one trailer). Rolls are 50 yards in length. Tape is made of B-752 diamond grade reflective material with presealed edges for extra durability and is warranted to perform for a minimum period of 7 years.