... or without coolingSpotsize: 1.5mm, 3mm, 5mm, 8mm Er: YAG variable pulse&franctional 2940nmWavelength: 2940m,Energy: 0.2 ... 1mm, 3mm, 6mm, 9mm and fractional tip, 8mm Er: Glass fractinal 1535nmWavelength: 1535nm,Energy: 1~6J,Duration: 3 ... laser 1064/532mm200~800j below 20ns 2mm, 4mm er: yag laser 2940nm 0.2~2j 0.5~ ... 3ms 1mm, 3mm, 6mm, 9mmfractional tip er: glass 1535nm1~6j 3~10ms fractional tip5~12mm ...