For car fresheners: Yes, you don't need to buy a needle-cap squeeze bottle to replace your acrylic paint, that's a real hassle. You only need to replace the paint cap with our customized luer lock cap, whether you want to draw fine lines or paint a large area, it can easily help you complete it, allowing you to create more exquisite and unique car fresheners. Two perfect needle sizes: choose the 2 sizes best for dyeing. Simply twist to fit perfectly into the hat. Round needles are used to draw lines. Flat needles can be used for dyeing large areas. Perfect for car fresheners with more intricate lines and details. Each needle comes with a silicone cap to prevent liquids from drying out. Fits bottles with neck sizes 24-410: Our bottle caps are made of plastic, which has good toughness, is not easily damaged, and can be reused. Fits 2 oz acrylic paint bottles on the market. Available in other 1 oz, 4 oz and 8 oz bottle neck sizes 24-410. The needle easily attaches to the bottle with just a twist, making it easy to use and a must-have tool for craft projects. Material: plastic colour: Green Package Contents: 8 x Luer lock bottle caps 1 x Cleaning needle tool 8 x Silicone needle sealing cap 8 x Luer lock blunt needle 8 x Luer lock blunt needle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.