TRITAN 05B-1 OSL Precision ISO (Metric) Roller Chain, Offset Link, 15.24 mm Length, 8 mm Pitch: Amazon.com: Industrial & Scientific
Amazon.com: Ametric® 085 ISO, 10 Foot Box, Single Roller Chain, 48X10FT Ametric® Part No, 12.7 mm Pitch(P), 6.4 mm (b1), 7.75 mm (d1), 15.4 mm (I), 1/2x1/4, 3.97 mm Pin Dia,(1-005) : Industrial & Scientific
ISO 5249 - European Standards
Metric Roller Chain - ISO British (Metric) Standard Roller Chain