What does Numbers 7:55 mean?

His gift was a silver plate weighing about three and a quarter pounds, and a silver bowl weighing about one and three-quarter pounds, both measured by the standard weight of the sanctuary, both filled with the best flour mixed with oil for a grain offering. Numbers 7:55 - Modern Text Bible

(Gamaliel's offering matches the others: silver containers filled with fine flour and oil, showing generosity and care for the ritual.)