Product Details1.Instruction: Easy to install, just place it on the fan and secure the matching screws with a screwdriver. If the mesh is dirty, it can be washed with water or cleaned with a brush.2.Advantage: Made of aluminum frame with stainless steel mesh filter, it has excellent pressure and corrosion resistance, better than other plastic mesh filters. Effectively improve the air flow effect of the fan to improve the fan's performance. It avoids the accumulation of dust as much as possible, thus keeping the fan clean and functional longer. Durable and sturdy, easy to install and clean.3.Specification: Color: Black; Material: Stainless Steel; Overall Size: 140mm x 140mm / 5.51inch x 5.51inch(L*W); Mounting Hole parallel Distance: 125mm / 4.92inch; Mounting Hole Diagonal Distance: 177mm / 6.