en_tn/exo/38/18.md

The bases ... courtyard were made of bronze

For 38:17-20, see how you translated many of these words in Exodus 27:16 and Exodus 27:17-19.

twenty ... five ... four

"20 ... 5 ... 4" (See: rc://en/ta/man/translate/translate-numbers)

cubits

A cubit is 46 centimeters. (See: rc://en/ta/man/translate/translate-bdistance)

The curtain was made of

This can be stated in active form. "They made the curtain out of" (See: rc://en/ta/man/translate/figs-activepassive)