The 4Tube Plug Str. by Fittings Unlimited Inc is a high-quality plug fitting designed for sealing 4mm tube ends. Made from durable materials, this fitting ensures a secure seal, preventing leaks in pneumatic and hydraulic systems. It meets industry standards for safety and reliability, making it suitable for both professional and DIY applications. The compact design allows for easy installation and maintenance, making it an essential component for any fluid transfer setup. This plug fitting is perfect for quick repairs and ensuring system integrity.