Industrial Grade O Ring Kit contains `metric` `inch` ` size` of o-rings and corder. The O Ring Kit can be availed in various specifications such as 70 NBR standard o-ring kits, 75 viton standard o-ring kits, 70 silicon standard o-ring kits, 75 viton metric o-ring kits, 90 NBR standard o-ring kits, 70 EPDM standard o-ring kits, 70 NBR metric o-ring kits, 90 NBR `boss` o-ring kits. The Industrial Grade O Ring Kit is durable that ensures long lasting life.