The EOS cover kit is used with the WLT300 and MWLT300 series, 300W, AC/DC, open frame power supply. This WLT300 CK cover kit is made from EG (zinc) 1.0mm. It is lightweight and easy to assemble. Inclusions: The contents of this cover kit include a mounting base, cover, insulator and fixing screws. Note: De-rating guidelines for WLT300/MWLT300: for an ambient temperature of >30°C, de-rate by 1.3W/°C to 40°C. 25CFM is recommended to circulate air.