58mm blind filter for flushing on semiautomatic espresso machines with a pressure release mechanism. It is designed to remove coffee that accumulates inside the group head, keeping the brewing environment clean and fresh. Made of a durable, practical material to support longlasting, reliable use. Compatible with cleaning tablets to enhance the cleaning process. This combination provides thorough cleansing of the group head and helps maintain machine performance. Easy to use: the regular filter with the blind filter during flush cleaning. Inserting the blind filter in the group handle enables a hassle cleaning experience. Specifications and features at a glance Size: 58 mm Type: blind filter Purpose: flush cleaning of the group head on semiautomatic espresso machines with a pressure release mechanism Material: durable, practical material Performance: effective removal of coffee residue to maintain a clean brewing environment Cleaning compatibility: works with cleaning tablets for enhanced cleansing Use scenarios Start of service day: perform a flush to remove any overnight residue and prepare the group head for the first shot. After busy service: backflush and clean the group head to prevent oil and coffee buildup between pulls. Periodic deep cleaning: use with cleaning tablets to thoroughly cleanse the group head and maintain machine performance.