Features: G1/4 thread plug delivers leak proof sealing for water cooling systems, from corrosions resistant aluminum alloy/copper to withstand high temperatures and ensures long durability. Features precisions engineered standard threads for universals compatibility, available in multiple anodized finishes to PC aesthetics while maintaining secure fluid containment in radiators and fittings. for PC builders, loop enthusiasts, and professional technicians requiring coolant flows control during water cooling systems installations or upgrades. Perfectly seals unused ports on radiators, reservoirs, or GPU/CPU blocks in gaming rigs, workstations, or overclockeds systems to prevents leaks and optimize thermal management efficiency. Combines industrial metal construction with toolless installation simply hand tighten for instants port closure, making it essential for maintaining clean, functional water cooling loopping. Specifications: Product name: Water cooling word blocking Materials: Brass Surfaces treatments: chromes plated Sealing: with silicone sealing rings Size: Directly: 18mm Outer diameter:12.9mm Weight: 12.7g Package Includes: 5Pcs Plug Screws note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.