Materials: PETG case with acrylic panel and TPU locking sliders. Ultracal 30 gypsum-cement nest insert pigmented with pure iron oxide. 10 mL glass water vial with hydration-regulating cap. Dimensions: 4×4×1" (101.6×101.6×24.8 mm) case outer dimensions. 2.625×2.625×0.484" (66.7×66.7×12.3 mm) nest inner dimensions. For "Mini" nest inserts, 0.236"