Gratnells Callero Custom Low Level 12 Deep Tray Adder Unit – Silver Frame with Sunshine Yellow Trays

The Gratnells Callero Custom Low Level 12 Deep Tray Adder Unit is a modular classroom storage solution designed to expand existing Callero Custom configurations. Featuring a durable steel frame and 12 deep Sunshine Yellow trays, it provides organized, space-efficient storage for STEM materials, classroom resources, and maker supplies. Its compact footprint helps maximize valuable learning space while keeping frequently used materials easily accessible.

Why Educators Use It

Schools, makerspaces, libraries, and STEM learning environments rely on flexible storage that grows alongside evolving classroom needs. This adder unit allows educators to create customized storage systems that improve organization, encourage student independence, and keep instructional materials readily available for hands-on learning.

Key Features

• Expandable low-level adder unit designed for Callero Custom storage systems.
• Includes 12 durable deep trays in Sunshine Yellow for high-capacity organization.
• Compact 16.9-inch depth maximizes storage while conserving classroom floor space.
• Heavy-duty steel frame supports up to 250 kg with trays rated for 5 kg each.
• StopSafe runners help prevent trays from being pulled out too far for added classroom safety.
• Smooth, rounded frame design minimizes sharp edges for child-friendly learning environments.

Classroom Applications

• Store robotics kits, engineering materials, and STEM project components.
• Organize classroom supplies by subject, grade level, or activity.
• Create modular maker and innovation spaces with expandable storage.
• Provide accessible resource stations that encourage independent student use.