The material of this bottle rack cap kit is PP and ABS, food grade materials, with good strength, corrosion resistance, stability and durability. You get 18 inverted bottle drain caps. They come in 3 sizes. Comes 6 of each size. The sealing gasket that can be used with the tank cover has excellent sealing effect and can effectively prevent liquid leakage. Tripod support design, more stable. You can use it without worrying about tipping or leaking. This concentrated liquid bottle emptying kit opens the nozzle to flow out the liquid, which is very smooth, will not hang liquid, will not waste, and is more convenient and faster to use. Our set of inverted bottle caps are versatile, you can use them for shampoo, drink bottles, condiment bottles, body wash, salad dressing and more. Suitable for kitchens, bathrooms and other occasions, bringing great convenience to your life. Colour: As Shown Material: Plastic Package Contents: 18 x bottle cap 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.