Syringe Cap Plastic, Black Inner diameter: 4mm 20 pieces ⚠️ Non-Sterile I bought these in a large bag, but I have too many, so I'm sharing some. I have not touched them directly with my hands. When handling and packaging, I will wear commercially available vinyl gloves and place them in a zip-lock bag. If you are using these for something that will come into contact with a pet's mouth, please thoroughly clean or disinfect them with alcohol, and take other hygiene precautions. If you would like to add more, I will sell them for 100 yen per 10 pieces. Please let me know the additional quantity (in units of 10) in the comments. These caps are compatible, but if you are using them for a catheter tip, please be sure to check if they fit the outer diameter of your tip before purchasing. #syringe #pump #cap #syringe #lid