Gratnells Callero Custom Low Level Adder Unit with 3 Deep Tilting & 12 Shallow Trays – Sunshine Yellow

The Gratnells Callero Custom Low Level Adder Unit provides flexible, high-density classroom storage in a compact footprint. Featuring three deep tilting trays and twelve shallow trays in Sunshine Yellow, it helps educators keep STEM materials, maker supplies, robotics components, and classroom resources organized and easily accessible.

Designed as part of the modular Callero Custom system, this low-level adder frame expands existing storage configurations while creating safe, efficient learning environments. Its durable steel frame, antimicrobial tray compatibility, and child-friendly design make it ideal for schools, libraries, makerspaces, and collaborative learning spaces.

Why Educators Use It

Educational spaces require storage that adapts as programs grow. This modular adder unit allows schools to expand storage without sacrificing valuable classroom space, helping teachers organize materials while supporting independent student access during STEM, engineering, science, and creative learning activities.

Key Features

• Includes 3 deep tilting trays and 12 shallow trays for flexible supply organization.
• Compact low-level frame maximizes storage while minimizing floor space.
• Modular adder unit connects seamlessly with existing Callero Custom systems.
• StopSafe runners help prevent trays from being pulled out too far for added classroom safety.
• Durable steel frame supports up to 250 kg with trays rated for 5 kg each.
• Smooth, rounded frame design enhances safety in student learning environments.

Classroom Applications

• Organize robotics, engineering, and STEM project materials.
• Store classroom manipulatives, science equipment, and maker supplies.
• Create accessible resource stations for collaborative learning.
• Expand library, innovation lab, or makerspace storage systems.