Gratnells Callero Tall Maker Adder Storage Unit with 28 Shallow & 7 Deep Light Gray Trays

The Gratnells Callero Tall Maker Adder Storage Unit is a modular classroom storage solution designed to maximize organization while minimizing floor space. Featuring 28 shallow trays and 7 deep light gray trays, it provides high-capacity storage for STEM materials, maker supplies, robotics components, and everyday classroom resources. Its durable steel frame and antimicrobial trays make it well suited for busy learning environments.

Why Educators Use It

Schools, makerspaces, libraries, and STEM labs rely on the Callero system to keep learning materials organized, accessible, and easy for students to manage independently. Its expandable modular design allows educators to build storage systems that grow alongside changing classroom needs while maintaining a clean and organized learning space.

Key Features

• Includes 28 shallow trays and 7 deep light gray trays for flexible storage.
• Modular adder unit connects with compatible Callero starter frames to expand storage capacity.
• Space-saving tall design offers high-density storage with a compact footprint.
• Durable steel frame supports up to 250 kg with trays rated for up to 5 kg each.
• Integrated StopSafe runners help prevent trays from being accidentally removed.
• Smooth, rounded frame design enhances safety in student learning environments.

Classroom Applications

• Organize robotics, engineering, and maker project materials.
• Store classroom manipulatives, science equipment, and STEM kits.
• Create expandable resource centers in classrooms and school libraries.
• Support student independence with clearly organized, accessible storage.