Gratnells Callero Tall Maker Store Adder Unit with 12 Shallow & 15 Deep Light Gray Trays

The Gratnells Callero Tall Maker Store Adder Unit is a high-capacity classroom storage solution designed to help schools organize STEM materials, maker supplies, robotics components, and everyday learning resources. Featuring 12 shallow trays and 15 deep trays in Light Gray, this modular storage unit maximizes storage while maintaining a compact footprint, making it ideal for modern classrooms, makerspaces, and libraries.

Designed as part of the expandable Callero Custom system, this adder unit connects with compatible starter frames to create customized storage walls that grow alongside classroom needs. Rounded steel construction and StopSafe runners help create a safer learning environment while keeping supplies organized and accessible.

Why Educators Use It

STEM classrooms require organized, flexible storage that adapts to changing projects and teaching spaces. The Callero Maker Store Adder Unit helps educators keep equipment, consumables, and student materials neatly arranged while improving accessibility, classroom efficiency, and independent student learning.

Key Features

• Includes 12 shallow and 15 deep Light Gray trays for high-capacity organization.
• Expandable adder unit integrates with the Gratnells Callero Custom storage system.
• Compact 16.9-inch depth provides maximum storage with a minimal classroom footprint.
• Durable steel frame supports up to 250 kg with trays rated for up to 5 kg each.
• StopSafe runners help prevent trays from being fully removed for added classroom safety.
• Rounded frame design minimizes sharp edges, making it suitable for student learning spaces.

Classroom Applications

• Organize STEM kits, robotics components, and engineering supplies.
• Store classroom maker materials and fabrication tools.
• Create centralized resource storage for science labs and innovation spaces.
• Manage shared classroom materials in libraries, media centers, and collaborative learning environments.