La Marzocco KB90 Group Head Screen Brand_Vedette built to accept any standard

built to accept any standard 58 mm I

Insert blind filter in portafilter and add up to 1/2 teaspoon (3 g) of Cafiza Powder

Balanced bypass built in

this is a likely first suspect

Fits: 3/8" John Guest OD push-fit tubing

La Marzocco KB90 Group Head Screen Brand_Vedette built to accept any standardLa Marzocco KB90 Group Head Screen The current shower screen for the KB90 group, stamped with a "Straight In" logo that marks correct portafilter engagement. Mechanically it's the same screen as the F. 3. 040 rigid Marzocco Lion screen, just with different etching for the KB90 application. SPECIFICATIONS Circumference: 57. 5 mm Height: 6. 9 mm Reference: same as F. 3. 040 (Marzocco Lion screen), KB90 specific etching COMPATIBILITY Fits: La Marzocco