Suppliers like FMC Weco and Kemper dominate with API-monogrammed seals, stocking 1-4 inch in NBR/HNBR. Lead times average 1 week, with Houston/Dubai hubs for 48-hour global delivery. Custom compounds for exotic fluids add 2 weeks. Blaze Sales offers online catalogs with durometer selectors. Vertical integration cuts costs 15%, supporting 10,000 units/month for shale plays. https://globalsealstech.com/product/hammer-union-seal-2/