Silver Bullet bestseller in 25mm size! Hotter, faster, even better. Silver Bullet Keratin 230 Ceramic Tourmaline Hair Straightener gives you exceptional heat acceleration and stability up to 230°C, an absolute must for all hair types and textures. Great for keratin, smoothing, straightening and texture modifying hair treatments. Standard size 25mm ionic ceramic and tourmaline floating plates are maneuverable and efficient. Easy-to-use temperature indicators – no more guesswork!