Gratnells Callero Custom Tall Slim Store Adder Unit with 24 Trays – Silver Frame & Sunshine Yellow Trays

The Gratnells Callero Custom Tall Slim Store Adder Unit expands existing Callero storage systems with high-capacity organization in a compact footprint. Featuring 16 shallow and 8 deep trays, this modular storage frame helps educators keep classroom materials, STEM supplies, and learning resources organized, accessible, and ready for everyday use.

Why Educators Use It

Designed for schools, makerspaces, libraries, and STEM classrooms, this tall adder unit maximizes vertical storage without taking up valuable floor space. Its modular design allows institutions to build customized storage walls that grow alongside changing classroom needs while supporting safe, organized learning environments.

Key Features

• Includes 16 shallow and 8 deep removable Gratnells trays for versatile storage.
• Compact tall frame provides high-capacity storage in a space-saving footprint.
• Modular adder unit connects seamlessly with compatible Callero Custom starter units.
• Steel frame supports up to 250 kg with trays rated for up to 5 kg each.
• StopSafe runners help prevent trays from being fully removed for added classroom safety.
• Rounded frame design minimizes sharp edges, making it suitable for student learning spaces.

Classroom Applications

• Organize robotics, engineering, and STEM project materials.
• Store classroom manipulatives, art supplies, and science equipment.
• Create modular resource walls in makerspaces and school libraries.
• Support classroom organization with clearly separated learning materials.