Product details1. Suitable for Macbook. 2. [11 13 Air] is12-pack of silicone rubber port plugs. ??? [13 15 Pro with HDMI Port] is 12-pack of silicone rubber port plugs. ??? [13 15 Pro with CD-ROM Drive] is 9-pack of silicone rubber port plugs. ??? [13 15 Pro with USB-C Port] and [12 Macbook] is 5-pack of silicone rubber port plugs. 3. Bright colors add style and flair to your computer. 4. Prevents dust 5. dust plugs were specifically designed only for Macbook Pro Retina and Air Laptops.