{
 "object": "ltd-chamber-ring",
 "license": "CC BY 4.0, Xem Studio",
 "les": "https://longearthsociety.com/engineering/",
 "files": [
  {
   "name": "ltd-100-chamber-ring-h20",
   "step": "/files/hardware/ltd-coffee-cup-engine-kit/ltd-100-chamber-ring-h20.step",
   "stl": "/files/hardware/ltd-coffee-cup-engine-kit/ltd-100-chamber-ring-h20.stl",
   "note": "chamber ring Ø100 bore × 20 tall, 10 mm wall, 6 × Ø2.5 (M3 tapped) through on a Ø112 circle; the displacer runs inside"
  },
  {
   "name": "ltd-150-chamber-ring-h20",
   "step": "/files/hardware/ltd-coffee-cup-engine-kit/ltd-150-chamber-ring-h20.step",
   "stl": "/files/hardware/ltd-coffee-cup-engine-kit/ltd-150-chamber-ring-h20.stl",
   "note": "chamber ring Ø150 bore × 20 tall, 10 mm wall, 6 × Ø2.5 (M3 tapped) through on a Ø162 circle; the displacer runs inside"
  }
 ]
}