The W2 Optimal White brush head is perfect for those who want to go beyond deep cleaning to remove surface stains for a white, radiant smile. This brush head is also great for maintaining brightness between professional whitening treatments ? Standard size ? Click-on ? BrushSync mode pairing Philips Sonicare's advanced sonic technology Philips Sonicare's advanced sonic technology pulses water between your teeth, and its brush strokes break plaque up and sweep it away for an exceptional daily clean. Diamond-shaped bristles give you upto 100% whiter teeth. The W2 Optimal White's stain-removal pad, made from densely-packed diamond-shaped bristles, removes surface stains caused by food and drinks. Automatically selects optimal mode for ultimate results. You'll always get the best possible clean with our BrushSync mode-pairing feature. The Philips Sonicare W2 Optimal White brush head syncs with your BrushSync enabled Philips Sonicare toothbrush handle, selecting the optimal brushing mode and intensity level for exceptional whitening. All you need to do is start brushing. The W2 Optimal White brush head is perfect for those who want to go beyond deep cleaning to remove surface stains for a white, radiant smile. This brush head is also great for maintaining brightness between professional whitening treatments? Standard size? Click-on? BrushSync mode pairing Smooth Writing:Calligraphy dip pens provide good control and stability delivering smoothness and an easy ink flow. the pen design allows fool-proof writing helping you hit that sweet spot with ease. dipped with ink per time it can write 20-30 words High quality material stainless steel nib, smooth for writing, wear-resistant, and not easy to damage. Lightweight, very comfortable to hold, thus very handy to practice calligraphy or write with it. 5 Extra Nibs: Our calligraphy kit comes with 5 Extra Nibs that offers you variety of writing styles.