Espresso Mirror Application: Suitable for professionals, kitchen, home, cafe, and more. Clear view for quality control: Provides a precise view of bottomless portafilter shots to observe flow rate and extraction, helping you improve espresso quality. Easy to clean: 70 mm diameter glass mirror is compact and easy to care for; simply wipe with a damp cloth and allow to dry. Convenient design: Without bending over every time you pull a shot, the Espresso Mirror lets you monitor extraction from your portafilter at a glance. Features and performance: Glass mirror construction; optimized for bottomless portafilter shots to support accurate observation and steady improvements. Specifications and compatibility Size: 70 mm diameter Material: Glass mirror Use: Designed for bottomless portafilter shots Use scenarios In a cafe during service to observe shot progression and adjust grind, dose, or tamp for consistent results. In a home espresso setup to study extraction visuals and refine technique. In a training or demo environment to demonstrate how extraction looks to baristas.