Made of durable silicone, these Dispense All brand blunt needle covers are perfect for sealing off blunt needle ends. Simply slide the cover over the blunt needle to make a liquid tight seal. These are made specifically for 14, 15, and 16 gauge blunt needles 0.5 inches and longer. Please note that silicone is gas permeable so while it will seal a blunt needle, it will let air in overtime. Contains 10 blunt needle covers.