Fits all 8020, 8021, 8025 8026, 8030, 8031 8035 and 8036 birdcages.

8020, 8021 were the 1st design with thin plates (3.250 wide)

8030 and 8031 are the same design but 1/2 thick plates.

8025, 8026 were the 1st design with thin plates (2.00 wide)

8035 and 8036 are the same design but 1/2 thick plates. (2.00 wide)

3.250 are for Shaw type race cars

2.0 are for GRT type race car.