Grohe Rapido SmartBox Universal Rough-in Box. 35600000 This high-quality bathroom accessory is designed to provide a seamless and effortless installation process. Made from durable chrome material, it is perfect for use in any bathroom setting. Featuring a universal connection thread and wall-mounted installation, this product is suitable for use with a variety of shower types. Additionally, the Grohe Rapido SmartBox Universal Rough-in Box comes complete with a door, making it an ideal choice for those looking to upgrade their existing shower system.