1. The brush is made of high-quality high-density nylon yarn, which has good elasticity and does not shed hair 2. High-quality stainless steel wire is wound, does not rust, brushing is flexible and not easy to deform 3. The bristles are in a spiral shape and are in good contact with the pipe wall of the straw. The water pipes, glass tubes, plastic hoses, and straws can be scrubbed more thoroughly and cleanly. Scope of application: Suitable for cleaning all kinds of milk bottles and water bottles built-in straws! Cleaning all kinds of aquarium glass pipes, water pipes, plastic hoses! Electronic product cleaning and so on. How to use: 1. Put the straw and the straw brush in the lotion (water with cleaning liquid) first, and gently use the straw brush to scrub back and forth. 2. Pass the brush head through the straw head, and then rotate the brush, the bristles wash away the parts that are not easy to wash. 3. After washing, please rinse the straw brush and hang it to dry. 4. Please do at high temperature to avoid damage to the bristles. colour:Black Material:Nylon + stainless steel size: 20cm Package Contents: 1 set x cleaning brushes (10 pcs) Only the above package content, other products are not included. Note: Light 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.