Pack of two replacement blades to suit the Blade Runner Standard and Strong. The quick change design allows the blade to be simply unclipped and replaced without the need for tools. On glass aquariums it is possible to use the metal blade on one side of the Blade Runner for tough algae removal and the plastic blade on the other for general use.
Plastic blades are designed for use on acrylic surfaces and general algae removal on Glass.
Always take care of sharp edges when replacing the blades.