Crisp and accurate with 'Air Wave' bottom eliminating air lock for maximum clarity. Bright and modern style and sound. B-20 metal, medium top, and heavy bottom. The Sabian 14" AAX X-Celerator hi-hat cymbals are for when you need hats that maintain their focus and crisp sound with even the most aggressive playing styles. Imagine never having to fight air lock again. Thanks to the air wave bottm, the X-Celerator hi-hats free you from that headache - all the while ensuring your rhythms cut with the crisp and accurate sound that Sabian AAX series cymbals are known for. Go ahead and play hard, the X-Celerator hi-hats can take it. These are new cymbals that have been a floor demo once.