{ "height_mm": 157.856, "max_diameter_mm": 54.11, "neck_diameter_mm": 28.0, "watertight": true, "winding_consistent": true, "volume_m3": 0.000297608913283581, "mujoco_load_passed": true, "collision_parts": 3, "extent_m": [ 0.05411, 0.05411, 0.157856 ], "shape_source": "Idealized cylinder body, tapered shoulder, cylinder neck; only height and maximum diameter inherited", "mass_source": "Previous XML mass 0.2308 kg retained; uniform solid inertia recomputed, not measured" }