Gratnells Callero Custom Tall Maker Store Adder Unit with 12 Shallow & 15 Deep Sunshine Yellow Trays (Silver Frame)

The Gratnells Callero Custom Tall Maker Store Adder Unit is a modular classroom storage solution designed to expand existing Callero Custom storage systems. Featuring 12 shallow trays and 15 deep trays, it provides high-capacity organization for STEM supplies, maker materials, robotics components, classroom resources, and project equipment while maximizing valuable floor space.

Built with a durable steel frame and Gratnells' trusted tray system, this tall storage unit helps educators create organized, accessible learning environments that encourage student independence and support hands-on instruction.

Why Educators Use It

Ideal for STEM classrooms, makerspaces, libraries, innovation labs, and collaborative learning environments, this modular adder unit makes it easy to organize a wide variety of teaching materials. The flexible design allows schools to expand storage as programs grow while maintaining a clean, efficient classroom layout.

Key Features

• Includes 12 shallow and 15 deep removable Sunshine Yellow storage trays.
• Designed as an adder unit for expanding Callero Custom storage systems.
• Tall, space-efficient frame maximizes storage with a minimal footprint.
• Heavy-duty steel frame supports up to 250 kg total load capacity.
• StopSafe runners help prevent trays from being pulled out too far for improved classroom safety.
• Compatible with Gratnells classroom trays and accessories for flexible organization.

Classroom Applications

• Organize robotics, engineering, and maker education supplies.
• Store science lab materials and classroom equipment.
• Create organized resource centers in libraries and STEM labs.
• Manage classroom manipulatives, art supplies, and shared learning materials.