The original Head Blade (yellow) adaptor is made for the Gillette Atra cartridge. HB also makes a black adaptor that is for use with Gillette Sensor or Sensor Excel carts. When you are shopping for store brand carts remember that on the back of the package the manufacturer of the carts tells what kind of razor the carts will fit, all you have to do is check the back and see if the carts will fit Atra or Sensor.
In the Head Shaving area of the forum, which is where we are now, under a thread entitled "Full list of blades to use with the Head Blade" Tyler (the absolute Gawd of SBG) detailed which blades go with which adaptor. Check that out.