12B-1 Steel roller chain, sold per metre.
Typical specification:
Pitch P: 3/4"
Roller Diameter A: 12.07mm
Width between inner plates B: 11.68mm
Pin diameter C: 5.72mm
Pin Length D: 22.5mm
Link Pin Length E: 24.2mm
Inner plate height F: 16mm
Plate thickness g: 1.85
Minimum tensile strength: 29kN
Average tensile strength: 32.2kN