The SteriPEN FitsAll Filter is a pre filter to remove particulates from water before purifying. It is recommended that particulates be removed prior to treating water with a SteriPEN UV purifier. The FitsAll Filter cup also serves as an adapter that allows the SteriPEN Journey or Classic to be used with wide-mouth water bottles in the inverted position. The FitsAll Filter's unique design offers flexibility to filter water into bottles with a wide range of mouth sizes. Water can be poured through the FitsAll Filter or you can submerge the combined FitsAll Filter and bottle of choice.

• Prefilter to remove particulates from water.
• Uses durable 4 micron screen.
• Fits all bottle sizes.
• Fits into narrow-mouth bottles such as commercial water bottles, soft-drink bottles, canteens and SIGG™ bottles.
• Fits wide mouth bottles such as such as Klean Kanteen®, Gatorade® and Nalgene® bottles.
• Adapts for wider-mouth bottles,only the cup is necessary.
• Lightweight and flexible for packing.
• Size:(3.5 in.) x 95mm (3.7 in.) x 72mm (2.8 in.).
• Weight: 2.3 oz.