1 pack of 3 per purchase. It’s a Multi listing format. So simply Choose the packs and the quantities you desire, 
They are packs of three so if you want a total of nine then buy 3 packs, 
JackCap Rubber Dust Plugs, 
Keep your musical instruments protected from dust and other debris with the JACKCAP Silicon Dust Plugs. These versatile plugs come in various sizes, including JC MIDI, XLR, 1/4in, and 1/8in, making them compatible with all standard musical instrument inputs, the soft silicone JACKCAP plugs feature a universal design and are perfect for keeping your equipment clean and free from damage.
Posted the same day of purchase, 1,000’s sold with fantastic reviews.