Not comparable to OEM part.
So close... but not acceptable!  No problem with fit, leaking or pressure as others have reviewed.<br /><br />However, this replacement unit is not as sturdy AND it imparted a distinct chemical taste & smell when used.  I would recommend spending the extra couple of bucks to order the official WP-100 Handle Assembly Kit by Waterpik.  The latter comes with: simple instructions (not that they are necessary), two mounting screws and a new Reed Valve (should you need it).  The manufacturer's kit is Perfect!
Rating: 1 stars