ADA Pro Razor - Extender - Replacement Blades

Pro Razor:  The Pro Razor is a scraper to remove algae on the glass.  Its handle can be extended with an optional Extender (see below).  This comes with 2 blades and the Pro Razor is 16 inches.   Extender:  The Extender is designed to connect with the Pro Razor as a handle for use in deeper and large sized tanks.   Replacement Blades:  This contains a set of two replacement blades for the ADA Pro Razor.  You should replace the old blade when the edge becomes dulled.  Using a dulled blade risks scratching your glass.    Please Note:  Each of the above three items are purchased separately.