Large quantity: 20 bottle caps, 20 needle connectors, 20 silicone needle caps, 20 round needles, 20 flat needles, 5 coarse puncture needles, 5 fine puncture needles, enough to meet your needs. Two types of needles: equipped with 5 round needles and 5 flat needles, both sizes of needles are easy to insert into bottle caps. Round needles are used to draw lines, while flat needles can be used for large-area coloring. Suitable for devices with complex lines and details. Suitable for bottleneck sizes 24-410: Suitable for 2 oz acrylic paint bottles. Suitable for other 1 oz, 4 oz, and 8 oz bottle sizes 24-410. The pin can be easily connected to the bottle by simply twisting it, making it easy to use. Convenient and safe: Made of plastic material, the shell is flexible, not easily damaged, and can be reused for a long time. By directly replacing the bottle cap, it is possible to switch between different types of needles, greatly improving work efficiency. Very suitable for DIY enthusiasts: These hats and needles easier to create the patterns you want, making them an ideal choice for DIY enthusiasts. It is also used for writing, painting, and other decorative purposes. Colour:As Shown Material:plastic Package Contents: 20 x flat needles 20 x round needles 20 x needle adapter 20 x bottle caps covers 20 x silicone needle caps 10 x clean needles 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.