Are you looking for straw cleaning brush? These are made of Nylon materials and are safe to use. It is perfect for cleaning test tube, drinking straw, bottle etc. Simple design, easy to use. Suitable for cleaning the inner wall of test tube, which will bring much convenience to you. Features - Color: White -Material:Nylon - Size: 22.00X3.00X3.00cm/8.65X1.18X1.18in -Brush Diameter: 22mm, 18mm, 16mm, 12mm, 10mm, 8mm, 7mm, 6mm, 5mm, 4mm, 3mm, 2mm - Versatile set for all your cleaning needs. Soft bristles that won't scratch surfaces, convenient. - Multiple brush designs for different tasks. Nylon materials for durability and reliability. - The brush kit is made of nylon material, with excellent texture and , durable. - The unique and creative design make this brush practical can meet your daily cleaning needs. - The brush kit is small and portable, can be easily disassembled, is convenient for you to carry. Package list: 1 x set of