Protective Cap Included: Each adapter comes with a protective cap to keep threads clean from dirt and debris, ensuring easy installation and maintaining seal integrity right out of the boxes Sealing: Features precisions machined 37° flared seat surfaces to fluid leakage in high pressure hydraulic systems, ensuring consistent systems pressure and safe Premium Stainless Steel Construction: Made from good 316L stainless steel, these adapters durability and reliability for industrial applications and high systems Bulk Pack for Professional: This10pcs bulk pack provides excellent value for professional and serious DIYers, allowing you to handle maintenance, repairs, or new builds without downtime due to missing parts Straight Through Flows: The straight tube minimizes flows restrictions and pressure drops in hydraulic lines, improving energy transfer and reducing fluid heating for efficient, Manufacturer: TFAOYS