Assure the security of needle covers, syringe caps, box tops and other medication containers. Unused medications may be returned and reissued if seals are intact. Available in two lengths: small (3.6 in. / 92 mm) and large (4.2 in. / 108 mm). Both sizes also available with "DON'T USE IF SEAL'S BROKEN" imprinted in red on silver foil. Non-sterile.