Amgate Drinking Straw Cleaning Brush Kit - 2 Pcs Small with 2 Pcs Large - Nylon and Stainless Steel (2 Small + 2 Large) Size: Small Cleaning Brush Length about 175 mm, Bristle diameters about 5 mm; Large Cleaning Brush Length about 200 mm, Bristle diameters about 10 mm Include: 2 Pcs Small Straw Cleaning Brush + 2 Pcs Large Straw Cleaning Brush Material: Made of food grade stainless steel wire, durable but soft nylon bristles for cleaning Perfect for Stainless Steel Straws and Glass Straws of Most size! Great for cleaning any small area - sippy cups, tight spots, pipes, etc