... without coolingSpotsize: 1.5mm, 3mm, 5mm, 8mm Er: YAG variable pulse&franctional 2940nmWavelength: 2940m,Energy: 0 ... 1mm, 3mm, 6mm, 9mm and fractional tip, 8mm Er: Glass fractinal 1535nmWavelength: 1535nm,Energy: 1~6J,Duration ... 5~3ms 1mm, 3mm, 6mm, 9mmfractional tip er: glass 1535nm1~6j 3~10ms fractional tip5~12mm ... we won't be able to respond. For help, please contact Alibaba.com Customer Support.Please ...