Features:

• 2 ultra-compact replacement brush heads
• Compatible with all original Sonicare and Advance Series handles
• Short bristle head and longer neck
• Ideal for smaller mouths and hard-to-reach places
• Color-coded for individual users

Editor Reviews:

Product Description:
Color-coded for individual users 2 ultra-compact replacement brush heads Compatible with all original Sonicare and Advance Series handles Short bristle head and longer neck Ideal for smaller mouths and hard-to-reach places

Amazon.com Review:
For optimum cleaning performance, electric toothbrush heads should be replaced every six months. This set of two ultracompact replacement brush heads fits all original Sonicare and Advance series handles. Color-coded for individual users, each brush head features a longer neck and shorter rows of extra-soft, rounded bristles in order to better fit smaller mouths, such as children's, and allow precision reach around braces. --Ann Bieri

Rating : - You Need Your Advance, Your Advance Needs Its Brush Heads
The bottom line: if your toothbrush is a Sonicare Advance, you are going to need replacement brush heads and that's reality. Both of my kids are using Advance and they should be replaced at lest every six months.

Like most of anything that's a Sonicare brand (there are exceptions) these are good quality products that last for the six months of twice-a-day daily use, as advertised. After that, you will need new brushes and Amazon has them while most other stores don't.

Life is good, smile :)