This specification covers glass beads to be dropped or sprayed upon pavement markings so as to produce a reflectorized pavement marking. The values stated in SI units are to be regarded as the standard. This standard may involve hazardous materials@ operations@ and equipment. This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use