With over 6,000 standard parts in inventory (Make to Stock or MTS), Swagelok has the widest range of quality Fittings, Valves and Accessories to suit your specific requirements. In addition, Swagelok provide Assemble to Order (ATO) products and products designed especially for your unique needs – Make to Order (MTO) and Engineer to Order Products (ETOP). All products come with Swagelok’s Limited Lifetime Warranty.