Features: Upgraded design ensuring smooth filaments feeding, from metal and plastic for 50% higher wear resistance than standard 3D printer pneumatic fittings. Features quick locking PC4 connectors with straight through/not straight through double port to prevent tube slippage, compatibles most DIY dry box and 3D printing setups. Ideal for users who requiring reliabled ABS highly temperature printing solutionsand efficient filaments dryer box customization. Maintains stable material flows during extended 24/7 printing perfect for industrial machines and multiple device creative studios. Seamlessly integrates with popular 3D printer parts and filaments dryer box accessories, featuring corrosion resistant components that outlasts conventional connectors by 60%. Specifications: Feed pipe parameters: PTFE feed pipe with 4x2.5mm (outer diameterxinner diameter) Process: Preciseinjection molding Parameters: PC4 interfaces specifications, suitable for standard feed pipe Size: about 3.50cm/pipe with 4mm outer diameter Quantity: 4-piece set Practicality: Suitable for 3D printer consumables inlet connection, ensuring stable material conveying, compatiblesh multiple 3D printer models Package Includes: 1set of PC4- feeding tube kit for inlet connectors note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.