CMA 1/4" x 1/4" x 3/8" Expansion Valve grimac/zola-1-2-eclisse-ten-twenty-boilers The lid has ventilation holes

The lid has ventilation holes so steam can vent

Replacement bezel/faceplate for the La Marzocco main power switch

When the tool doing that job is built right

Fits 10 mm outside diameter steam wands

CMA 1/4" x 1/4" x 3/8" Expansion Valve grimac/zola-1-2-eclisse-ten-twenty-boilers The lid has ventilation holesCMA Expansion (Over Pressure) Valve Combination expansion over pressure valve with a built in one way check valve, protecting the boiler from excess pressure while preventing backflow. SPECIFICATIONS 1 4" x 1 4" x 3 8" valve ports Includes integrated one way retention valve COMPATIBILITY Fits: CMA equipped espresso machines using this 1 4" x 1 4" x 3 8" valve INSTALLATION Should be installed by a qualified technician, as it's part of the boiler's