Improve workplace safety with GHS stickers that help workers understand the hazards of the chemicals they are handling These Right to Know / SDS labels are handwritable with ballpoint pens and permanent markers like Avery Marks A Lot UltraDuty Markers (handwrite-only and not compatible with laser or inkjet printers) Preprinted with GHS pictograms and areas to mark the signal word, product identifier and supplier information Durable and waterproof labels, these labels are also resistant to chemicals, abrasion, UV rays, tearing and harsh temperatures Tested to remain adhered for 90 days in seawater, these BS5609 Sec. 2 certified labels are built to last