fitness stairs Sizes: 150 × 150 / 200 × 300 / 637 × 956 / 637 × 955 / 1024 × 1536 / 1365 × 2048 / 265 × 150 / 637 × 440 / 300 × 300 / 600 × 900 / 100 × 100 / 300 × 300 / 600 × 900 / 100 × 100 / 1707 × 2560