The material of scraper directly affects the scrapping effect. Scraping boards made of different materials have different therapeutic and conditioning effects on diseases. Although there are many kinds of scraping boards, from the scraping effect, Sibin Bian Shi scraping board is the first choice, followed by ox horn, jade and porcelain. The edge plate is made of pumice in Sibin, which has special energy fields such as far infrared and ultrasonic waves. Direct or indirect contact with human body can improve human microcirculation, promote blood circulation, remove blood stasis and treat diseases. Scraping the body with a stone scraper produces 3708 ultrasonic pulses at a time, which is 10 times that of ordinary scraper. I hope my answer can help you!