40B-1 Steel roller chain, sold per metre.
Typical specification:
Pitch P: 2 1/2"
Roller Diameter A: 39.37mm
Width between inner plates B: 38.1mm
Pin diameter C: 22.89mm
Pin Length D: 82.2mm
Link Pin Length E: 89.2mm
Inner plate height F: 52.96mm
Plate thickness g/G: 8.5/8.0
Minimum tensile strength: 355kN
Average tensile strength: 394kN