About this item Product Usage: 54mm Blind filter is used for backwashing semi automatic Italian machines, helping to wash the accumulated coffee in the coffee machine head. Backflush inser is a practical coffee accessory Stainless Steel: 54mm Backflush insert is made of study 304 stainless steel, which is waterproof, and easy to wash.The hard material can withstand daily accidental collisions and extend the service life of the backflush insert 54mm Usage: Back flush blind filter basket from the coffee machine handle, place the blind bowl into the coffee machine handle, then add washing agent for washing, press the brewing button to rinse until clear water flows out, remove the backflush inser Easy to Install: 54mm Blind filter is easy to install and can be directly replaced with old or damaged ones. Backflush filter espresso is small in size, light in weight, and can be carried around with you.After washing, dry and store without taking up space Warm Tips: Backflush filter espresso is suitable for most commercial machines, but not for any household device models that do not use three ways solenoid valves. Need to confirm whether the coffee machine has this function and its size