Gratnells Callero Tall Maker Store Adder Unit with 12 Shallow & 15 Deep Cyan Blue Trays

The Gratnells Callero Tall Maker Store Adder Unit is a modular classroom storage solution designed to maximize organization while minimizing floor space. Featuring 12 shallow and 15 deep Cyan Blue trays, this high-capacity unit keeps STEM materials, classroom resources, robotics components, and maker supplies organized, accessible, and ready for daily learning.

Built with a durable steel frame and Gratnells' trusted tray system, this adder unit expands existing Callero Custom storage configurations to create flexible storage walls that grow alongside evolving classroom needs.

Why Educators Use It

Schools, makerspaces, STEM labs, and libraries rely on the Callero Custom system to create organized learning environments that support independent student access and efficient classroom management. Its modular design allows educators to expand storage as programs grow while maintaining a clean, safe, and professional learning space.

Key Features

• Includes 12 shallow and 15 deep Cyan Blue storage trays for versatile organization.
• Modular adder unit expands existing Callero Custom storage systems.
• Space-saving tall frame provides high-capacity storage within a compact footprint.
• StopSafe runners help prevent trays from being fully removed, improving classroom safety.
• Heavy-duty steel frame supports up to 250 kg with durable polypropylene trays.
• Smooth, rounded frame design enhances safety in student learning environments.

Classroom Applications

• Organize robotics kits, engineering components, and STEM supplies.
• Create accessible storage for makerspaces, innovation labs, and fabrication classrooms.
• Store science equipment, art materials, and classroom manipulatives.
• Expand school resource centers and collaborative learning environments with modular storage.