Gratnells Callero Custom Low-Level 16 Shallow & 4 Deep Tray Adder Unit – Sunshine Yellow Trays

The Gratnells Callero Custom Low-Level 16 Shallow & 4 Deep Tray Adder Unit is a modular classroom storage solution designed to maximize organization while minimizing floor space. Featuring 20 removable trays in a compact, low-profile frame, it helps educators keep STEM materials, classroom supplies, and learning resources neatly organized and easily accessible. Its expandable design makes it ideal for schools creating flexible and scalable learning environments.

Why Educators Use It

Built for busy classrooms, makerspaces, libraries, and STEM labs, this storage unit supports efficient resource management while encouraging student independence. The modular Callero system grows alongside classroom needs, making it an excellent long-term storage solution for educational environments.

Key Features

• Includes 16 shallow trays and 4 deep trays for flexible storage of classroom materials.
• Modular adder unit connects with existing Callero Custom frames to expand storage capacity.
• Compact low-profile design fits beneath displays, along walls, or in collaborative learning spaces.
• Steel frame supports up to 250 kg while each tray holds up to 5 kg.
• StopSafe runners help prevent trays from being pulled out too far, improving classroom safety.
• Smooth, rounded frame design minimizes sharp edges for child-friendly learning environments.
• Durable steel frame with polypropylene trays designed for everyday educational use.

Classroom Applications

• Organize STEM kits, robotics components, and engineering materials.
• Store classroom supplies for science labs, makerspaces, and innovation centers.
• Create accessible resource stations that promote independent student learning.
• Expand existing classroom storage systems as educational programs grow.