Material reliability: Our bottle caps are made of high-quality plastic, sturdy and not easily broken, , reusable, flexible, easy to squeeze and control liquid . Strong practicality: Blunt needles are used to draw lines, while flat needles can be used for large-area coloring, suitable for car fresheners with more complex lines and details. Our bottle caps are suitable for bottles with a mouth size of 24-410 and for 20 ounce acrylic paint bottles. Needles can be easily connected to bottles by simply twisting them, making them a convenient and essential tool for manual projects. Packaging content: You receive a total of 41 items, including 8 applicator caps, 8 blunt needles, 8 flat needles, 16 silicone needle caps, and 1 needle cleaning tool. Easy to use: You don't need to purchase a needle cap squeeze bottle to replace the acrylic paint, just replace the paint cap with our customized Ruhr bottle cap, allowing you to create more exquisite and special car fresheners.