HEWLETT PACKARD CraftyCroc CC1-300 Chalkboard Labels, Premium Quality, Fancy Adhesive Stickers for Jars, Large Write Performance - Class 10 rating, 10MB/s (66X) Read Performance - Up to 20MB/s Capacities - 32GB Temperature - Tested to perform from -25 C to 85 C (-13 F to 185 F) Durability - Shock protection and RTV silicone coating added inside for protection against moisture and humidity