This set of hopper braces is designed to fit the Bowser PRR Class H21a hopper interior for a realistic look and complete five cars for a great value. The kit includes 25 straight braces and 10 ribbed dual braces. This kit will work with the Bowser coal load if your car came with that.
Installation instructions can be fountd
here.
To help with the installation of the braces, an alignment fixture can be purchased
here.