Specification: Package includes:50 pack metal straws brush Metarial: 18 8 stainless steel nylon Length:9 inch(230mm)?Easy to Clean? - Dishwasher Safe. These pipe cleaners are easy to clean after use since they can easily throw it in the top rack of the dishwasher, and this won't affect the brushes' effectiveness and functionality. ?Easy To Use? – Simply insert it into the pipe, rotate it, remove and wash it. With the long, soft but durable bristles, it can be used to clean each size of straw pipe you have and does not scratch the inside of straws. Moreover, it doesn't leave a lot of fuzz behind in the pipe like Chenille pipe cleaners do which you need to take the trouble to get rid of it. ?Durability Multifunctional? –The brush is very flexible but will not break easily which is much stronger than some inferior and fragile straw brushes. great to clean your reusable metal, stainless, silicone, glass and bottle straws, Suitable for all kinds of drinking straws on Tumbler, Sippy Cup, Baby Feeding Bottles. Also can use to clean Tiny Pipe, Narrow Tube, Coffee Pot, Sink Drain, Hummingbird Feeder, Weed Smoking Bong and other hard to access corners tube. ?Food Grade Safety? – The straw brushes for cleaning made of 18 10(304) stainless steel that is food grade safety material. The bristles made of nylon which is very soft ,durable and strong ,easy to clean that can get around any surface or any depth of the pipe. ?Bulk Order? -50 pack set. the straws cleaning brush size: 9 inch long 0.4 inch diameter(230 10mm).