Bathtub Spa "Jet Capoffs" (Jet Cap offs)
Helix Size (Threads): 3/4" -10-1; Diameter: 20.33; (Ptich: 2.35mm)
Type A: For rear, longer
Type B: For sides, shorter
Cap: For main intake
Unfortunately there's no model data available for the tub/jets to reference, custom fit per jets removed from the existing tub.
The author marked this model as their own original creation.