Total Height of Double Sided T Type teeth Timing Belt Type W T D-MXL 0.508 1.53 D-XL 0.508 3.05 D-L 0.762 4.58 D-H 1.372 5.95 D-XH 2.794 15.49 D-XXH 3.048 22.11 D-T2.5 0.60 2.00 D-T5 1.00 3.40 D-T10 2.00 7.00 D-T20 3.00 13.00 D-AT10 2.00 7.00 Dimension of Double Sided T Type Teeth Timing Belt Size Pitch Length (mm) Teeth No. 78XL-1300XL 198.12~3302.00 39~650 113L~1192L 285.75~3028.95 30~318 145~1700H 368.30~4318.00 29~340 507XH~1260XH 1289.05~3200.40 58~144 700XXH~1700XXH 1778.00~4318.00 56~136 T2.5x145~T2.5x950 145.00~950.00 200~950 T5x150~T5x3255 150.00~3255.00 30~651 T10x400~T10x4280 400.00~4280.00 40~428 T20x1080~T20x3620 1080.00~3620.00 54~181 AT10x500~AT10x3150 500.00~3150.00 50~315