Gratnells Callero Custom Low Level 4 Deep & 4 Jumbo Tray Adder Unit – Silver Frame with Sunshine Yellow Trays

The Gratnells Callero Custom Low Level 4 Deep & 4 Jumbo Tray Adder Unit provides flexible, high-capacity storage for modern STEM classrooms, libraries, and makerspaces. Combining deep and jumbo trays within a compact footprint, it helps educators organize everything from robotics kits to science equipment while keeping materials accessible for students.

Built with a durable steel frame and Gratnells' trusted tray system, this modular storage unit can be added to larger Callero Custom configurations as your learning space grows. Its low-profile design also doubles as a practical classroom work surface or display area.

Why Educators Use It

This storage unit supports organized, student-centered learning by making classroom resources easy to access and manage. The combination of deep and jumbo trays accommodates a wide variety of STEM materials, helping teachers create efficient, flexible learning environments that adapt to changing instructional needs.

Key Features

• Includes 4 deep trays and 4 jumbo trays for versatile storage capacity.
• Low-profile modular frame integrates seamlessly with Callero Custom storage systems.
• Compact footprint maximizes storage without taking up valuable classroom space.
• StopSafe runners help prevent trays from being accidentally removed.
• Strong steel frame supports up to 250 kg total load capacity.
• Durable polypropylene trays resist everyday classroom wear and are easy to clean.

Classroom Applications

• Organize robotics, engineering, and STEM project materials.
• Store science lab equipment and classroom supplies.
• Create flexible storage in makerspaces and innovation labs.
• Support classroom libraries, resource centers, and collaborative learning spaces.