... or without coolingSpotsize: 1.5mm, 3mm, 5mm, 8mm Er: YAG variable pulse&franctional 2940nmWavelength: 2940m,Energy: 0.2~2j,Duration: 0.5~3ms,Spotsize: 1mm ... : yag 1064nm5~18J 3~10ms without cooling 1.5mm, 3mm, 5mm, 8mm 2~6mm/5~12 variable size long pulse nd: yag 1064nm5 ... ~18J 3~10mswith cooling 1.5mm, 3mm, 5mm, 8mm ...