596-00918 Variable data placards are used to mark areas specific to the individual installation, like voltage data. Made of the same durable material as pre-printed metal solar placards, HellermannTyton offers two styles of variable placards: hand-writable and engravable. Both hand-writable placards feature a silver variable data area that can be marked using an industrial paint pen. Engravable placards have a black area that can be engraved using standard engraving equipment.