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Set of three J-2 Engines in 1:72 Scale for Saturn IB or Saturn V S-IVB stage (or S-II). No guarantee of kit compatibility. Central attachment stud is 1/8" dia (3.18mm). Scale inlet ducts have short 1/16" dia. studs to aid in further detailing and/or model mounting.
If used with a kit, modification to the kit and/or part will likely be necessary.