About this item Smoking screen measurement: this set of smoking screens is in round shape and 9.5/12.7/15/15.8/19/20mm in diameter, common and general for fitting most smoking pipe or bowl. Quality pipe screen filters: these pipe screen filters are made of 304 stainless steel, quality and durable, can resist rust and erosion, easy for using, cleaning and sterilizing. Smoking pipe assistant: the pipe screens can prevent the hot ash and embers from entering the pipe, allowing free flow of smoke and air while keeping dirty, harmful ash from pulling through your pipe. Convenient storage box: there is 1 plastic storage box, measures 6 x 6 x 2.8 cm, easy and convenient for your to store these small items, preventing them from losing and dust. Quantity: this package includes 150 pieces of smoking screens and 1 piece of plastic storage box, they are very useful for smoking enthusiast, giving you enjoyable smoking experience.