* Delete 1 Part 2453 Black Brick 1 x 1 x 5 - Undetermined Stud Type
* Add 1 Part 2453a Black Brick 1 x 1 x 5 - Blocked Open Stud or Hollow Stud
* Delete 1 Part 2453 Light Gray Brick 1 x 1 x 5 - Undetermined Stud Type
* Add 1 Part 2453a Light Gray Brick 1 x 1 x 5 - Blocked Open Stud or Hollow Stud
* Delete 1 Part 2453 Black Brick 1 x 1 x 5 - Undetermined Stud Type
* Add 1 Part 2453a Black Brick 1 x 1 x 5 - Blocked Open Stud or Hollow Stud
* Delete 1 Part 2453 Light Gray Brick 1 x 1 x 5 - Undetermined Stud Type
* Add 1 Part 2453a Light Gray Brick 1 x 1 x 5 - Blocked Open Stud or Hollow Stud