The Grade 8 chain is embossed with grade and batch code traceability. All sizes for the Grade 8 are proof tested at manufacture to 2.5 times the given working load limit and have a range of diameters from 7mm - 32mm. The chain is suitable for use in a temperature range of -40°C up to 200°C without reduction in working load limit, reductions apply up to 400°C.