industrial stand fan,30",750mm,with metal construction.3-speed,UL/NOM/CE/GS/CUL certification. industrial stand fan,szie:30",750mmwith metal constructionautomatic protection for motor overheatingadjustable tilt blowing angel,3-speed blowing controlbig round baseextendable tube for adjusting height of the fanwith UL/NOM/CE/GS certification.