Maryland Metrics supplies 2.5 and 3 times Speed-Fold Conveyor Chains manufactured in accordance with JB/T7364.
| Chain No. | Pitch | Roller Dia. | Cyro Wheel Dia. | Roller Depth | Cyro Wheel Depth | Bearing Pin Body Dia. | Plate Depth | Outer Link Plate Thickness | Inner Link Plate Thickness | Width over Bearing Pin | Width over Connecting Link |
| mm | |||||||||||
| BS 25-C206B | 19.05 | 11.91 | 18.3 | 4.0 | 8.0 | 3.28 | 8.26 | 1.3 | 1.5 | 24.2 | 27.5 |
| BS 25-C208A | 25.40 | 15.88 | 24.6 | 5.7 | 10.3 | 3.96 | 12.07 | 1.5 | 2.0 | 32.6 | 36.5 |
| BS 25-C210A | 31.75 | 19.05 | 30.6 | 7.1 | 13.0 | 5.08 | 15.09 | 2.0 | 2.4 | 40.2 | 44.3 |
| BS 25-C212A | 38.10 | 22.23 | 36.6 | 8.5 | 15.5 | 5.94 | 18.08 | 3.0 | 4.0 | 51.1 | 55.7 |
| BS 25-C216A | 50.80 | 28.58 | 49.0 | 11.0 | 21.5 | 7.92 | 24.13 | 4.0 | 5.0 | 66.2 | 71.6 |
| BS30-C206B | 19.05 | 9.0 | 18.3 | 4.5 | 9.1 | 3.28 | 7.28 | 1.3 | 1.5 | 26.3 | 29.6 |
| BS30-C208A | 25.40 | 11.91 | 24.6 | 6.1 | 12.5 | 3.96 | 9.60 | 1.5 | 2.0 | 35.6 | 39.5 |
| BS30-C210A | 31.75 | 14.80 | 30.6 | 7.5 | 15.0 | 5.08 | 12.2 | 2.0 | 2.4 | 43.0 | 47.1 |
| BS30-C212A | 38.10 | 18.00 | 36.6 | 9.75 | 20.0 | 5.94 | 15.0 | 3.0 | 4.0 | 58.1 | 62.7 |
| BS30-C216A | 50.80 | 22.23 | 49.0 | 12.0 | 25.2 | 7.92 | 18.6 | 4.0 | 5.0 | 71.9 | 77.3 |