← All assets · 3D models B Bulkhead Tube Sleeve (Pneumatic Tube Mail Exchange) Download GLB (62 KB) Flanged wall penetration sleeve, dimensioned to seat around the transport shell. modernrealistickit CC0 — free for any use, no attribution required Type3D model CategoryProps Triangles1.6k StyleRealistic FormatGLB Size62 KB LicenseCC0 SourceCollected by EarthOnline