Organize your PDT FlipTop™ Cassettes with our color-coding ID Tubes! Aloha™ Cassette ID Tubes come in bags of 6 and are available in 12 colors: Orca Black, Coffee Brown, Nautical Blue, Tropical Green, Dolphin Gray, Sky Blue, Sunset Orange, Orchid Pink, Passionate Purple, Coral Red, Coconut White, and Sunshine Yellow.