General description The 10X 58mm Coffee Machine Blank Filter is designed to fit into the group handle in place of the standard filter. This stainless steel swirl cleaning blind bowl is essential for rinsing the back of your coffee machine, helping to remove coffee residue that accumulates inside the group head. It can also be used with cleaning tablets for effective maintenance. Technical specifications Color: Silver Material: Stainless Steel Size: Length: 70mm Bottom Diameter: 58mm Diameter: 60mm Height: 20mm Package Contents: 10 x Blind Cup, Non-porous Filter Bowl Measurement allowed error: +/- 1-3 cm Installation Remove your filter basket from the portafilter and place it in a rinse disc basket. Ensure your coffee machine has a suitable relief valve and that the diameter is correct for your coffee machine. Usage Pour about 0.5 teaspoons of backflow cleaner into the basket. Replace the portafilter in the brew group and turn on the pump. Wait about 20 seconds until the pump becomes