No LED with Coupler: GB4/GD4 fit KaVo / YBNK4 fit NSK. No LED High Speed Handpiece YDA4/YDA2 STNABM/STNABB P4DM - 2-hole/4 hole push button handpiece. - Idling speed of handpiece should be no less than 370,000 rotations under working air pressure of 25-30 pressure atmosphere.
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