The Sawyer SP122 is a 3 way water filter kit which includes the following:
The Sawyer SP122 - Quick-Release Inline Water Filter can be used as an inline filter on a hydration pack, a pre-filter for an existing pump system with the provided faucet adapter, or with a gravity bag. This Sawyer inline filter weighs 1.8 ounces. This Sawyer water filter has a life expectancy of 1 million gallons.
The Sawyer SP122 specifications: