Features standard 3/4 inch external threads (actual diameter 1.05 inches) for easy compatibility with all standard garden hose fittings, internal threads (actual diameter 0.84 inches) for directs connection to hoses, faucets, and various accessories. Upgraded reverse thread (left hand) and nut design allows simple and secure operations by hand or wrench, loosening. Quick installation requires only a 1.2 1.25 inch pre drilled hole, significantly improving assembly efficiency. Made from resistant with a sturdy structure that resists fading or cracking. Thicken baffles and reinforced thread design enhances pressure resistance for long term use in wet environments. Equipped with thicken rubber gaskets and reinforced threaded connection to ensures superior sealing , liquid leakage, slippage, or loosening for stable, leakproof connection. Package includes: 10pcs Water Tanks Adapter Fittings