EnduroSat's 12U XL CubeSat Structure is a space-qualified primary frame for advanced CubeSat and SmallSat missions that need generous internal volume without a mass penalty. The 12U structure is precision-machined from Aluminum 6082 and comes in at 2.44 kg complete with fasteners and six mounted rings, keeping the chassis under 3 kg. A hard-anodized, pearl-finished surface protects the frame through handling, integration, and environmental test campaigns, while full PC104 compliance and CubeSat Standard conformance ensure straightforward stacking of commercial off-the-shelf avionics.

The modular layout of this CubeSat structure lets integration engineers assemble the spacecraft vertically or horizontally, simplifying access to internal modules during build-up and late-stage payload installation. Configurable kill switches – with an option for four – support deployer safety requirements. As part of EnduroSat's structures family alongside the 8U and 16U frames, the 12U XL satellite structure gives mission designers a proven mid-to-large CubeSat chassis from a supplier with thousands of modules delivered to orbit.