1,Rust proof treatment 2,Ball bearing keeps flags rotate freely in the wind. 3,Many bases available.Just let us know where use 1,Rust proof treatment2,Ball bearing keeps flags rotate freely in the wind.3,Many bases available.Just let us know where you use them4,All bases suit all poles with same diameter ( function(){ var aBigImageSrc = [ 'http://i00.i.aliimg.com/photo/v0/747938756_1/ ...