Genuine Gaggia Classic Pro Steam Arm Silicone O-Ring OEM replacement part for Gaggia Classic 2019 and Gaggia Classic Pro espresso machines. This red silicone O-ring seals the steam arm to pipe joint, preventing leaks during operation. What is this part? This is the steam arm silicone gasket (Part #240) that sits between the steam wand and steam pipe on your Gaggia Classic Pro. Over time, heat and pressure cause this seal to wear out, resulting in steam leaks. Specifications Part Number: 996530013445 Ring Thickness: 2.0mm Internal Diameter: 8.0mm Material: Red silicone Compatibility: Gaggia Classic 2019, Gaggia Classic Pro Origin: Made in Italy Why replace this O-ring? A worn steam arm O-ring reduces steam pressure, creates mess, and can damage surrounding components. Replacing this seal restores proper steam function and prevents further wear. Installation Remove the steam wand assembly, replace the old O-ring with this genuine part, and reassemble. No special tools required. Genuine OEM Gaggia spare part – Made in Italy.