4U 19 inch Rack Shelf constructed from 1.5mm Steel and is ideal for easy access to equipment.This 4U Rackmount shelf can be mounted from the front with M6 Screws and has a powder coated finish available in both black and grey.This 4U Rack shelf has punched side walls for better ventilation.To add an M6 Rack Mount Screw Pack please click here to go to the product page.