Color code your keys for quick and easy identification. The soft rubber cap makes it easy to slip-fit onto the head of your existing keys. Fits most standard size key heads. Color code your keys for quick and easy identification. The soft rubber cap makes it easy to slip-fit onto the head of your existing keys. Fits most standard size key heads. Assortment of Neon Colors: Yellow, Green, Orange and Pink. (5) Retail Cards with 6 Key Identifiers per card 200 Key Identifiers per Bulk Bag 200 Key Identifiers per Plastic Drum. I.