1. one hundred pc new and effective 2. Product name: cutter head 3. Easy to install 4. Please ensure your model is right 5. This is not- , however the positive also is very good. Specification: New and tremendous Model: for Boost Cutter Head Material: Plastic colour: black Package Contents: 1 x Hair Clipper Blade 1 x clear brush Only the above package content, different products usually are not included. Note: Light reflection and various displays may cause the colour of the article in the photograph a little bit varied from the real thing. The measurement allowed error is +/- 1-3cm.