Dental high&low-speed handpieces in our company have two series-- J and M series for your choice. Other accessories are exactly the same except the bearings. Under normal use dental handpiece enjoy three- months free warranty, please rest assured of purchase. Model J-CA M-CA Bearing UK Bearing Japanese Bearing Description: Dental contra angle handpiece Supply air pressure: 245-392KPa (2.5-4kgf/Cm) Rotation speed: 22-27krpm Weight: 0.07kg Accessories: contra angle handpiece wrench Characters: 1. Spring-stucked bur. 2. The pull coupling is similar to NSK EX-203