Under reference SAI 1800, here is a car roof rack measuring 10 x 14 mm, at HO 1/87th scale.
A SAI manufacturer presentation,
The brand SAI Collections, offers various cars, models, dioramas, characters, vehicles and electric accessories from the model making. Most of their products are designed in HO: 1/87th, N: 1/160th or Z: 1/220th scale.