Conair pro tourmaline finger diffuser creates negative ions for faster, smoother and more gentle drying. This is a universal fit for Conair / Babyliss dryers but not universal to all dryers out there. Also there are 3 other Babyliss diffusers as well. Model #’s for them. BABDF1(for full size dryers),BABDF2(for mid-size dryers), AND BABDF06 (doesn’t specify size)