These laser diode modules are OEM devices and conform to the emission criteria of BS (EN) 60825. It is recommended that this standard and the Data Sheet are read before these lasers are used. Serious eye damage may result if any laser of 1mW or above is pointed directly at the eye. Sigma Diode Laser Module, Compact. User focusable Ideal for experimental ; educational use Isolated brass body Size:10.4mm dia x 16.5mm Potted for better heat dissipation