Gratnells Callero Tall Maker Adder Storage Unit with 28 Shallow & 7 Deep Translucent Trays – Silver Frame

The Gratnells Callero Tall Maker Adder Unit provides high-capacity classroom storage in a compact footprint, making it ideal for STEM labs, makerspaces, libraries, and learning environments. Featuring a durable silver steel frame with 28 shallow and 7 deep translucent trays, it helps educators organize materials while keeping supplies visible and easy to access.

Designed for modular classroom layouts, this adder unit expands an existing Callero Custom storage system, allowing schools to create storage solutions that grow alongside their programs.

Why Educators Use It

STEM classrooms rely on organized learning spaces where students can independently access tools and materials. The combination of shallow and deep trays supports everything from small electronics and robotics parts to larger classroom resources, while antimicrobial trays and StopSafe runners help create a cleaner and safer learning environment.

Key Features

• Includes 28 shallow and 7 deep translucent storage trays for versatile organization.
• Modular adder unit expands compatible Callero Custom storage systems.
• Compact 16.9-inch depth maximizes storage without taking up valuable classroom space.
• Heavy-duty steel frame supports up to 250 kg with trays rated for up to 5 kg each.
• Translucent trays allow quick identification of stored materials.
• StopSafe runners help prevent trays from being accidentally removed, improving classroom safety.

Classroom Applications

• Organize robotics, engineering, and maker project supplies.
• Store STEM kits, classroom manipulatives, and lab materials.
• Create expandable storage walls for makerspaces and innovation labs.
• Support student self-service access to shared classroom resources.