API 6A wellhead equipment seals are engineered to meet the stringent requirements of API Specification 6A for pressure-containing and pressure-controlling components in surface wellheads, trees, and valves. Manufactured under PSL2–4 and PR1–2, they cover temperature ratings K through Y (–60°C to 345°C) and material classes AA through HH-NL for sour service. https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/