... galvanised steel sheets .Blade:6 pieces stainless steel blades and fans with big air volume, without deformation, no breaking ... , attractive and durable.Belt Pulley: aluminium, light weight, high-strength. ... /h1.1KW1378X1378X450380V50HZRBRF-1400140055800m3/h1.5KW1536X1536X450380V50HZ RB fan and pad from greenhouse equipment and poultry equipments