Before ordering, please note that all our products do not include tax, you need to declare your own tax!（Except the EU and the US） If you need to send UPS/Fedex/TNT/DHL, please contact us. We need to discuss the freight with you. Technical questions e-mail：support@trianglelab.net Sales questions e-mail：sales@trianglelab.net The trianglelab has always been concerned about product quality.We are developing products and working hard to improve the quality.We will not abandon our reputation because of many cheap products on the market.It is believed that only high quality products can ensure the quality of your work and bring safety to your work. Some of our products may be more expensive than others,but please believe in our quality and believe that you will not regret when you receive the goods. ▇ Name：Conch Hotend® Perfect Fit for QlDl plus4▇ All-MetalHeat Break EndCoatrm Ultra-Wear-Resistant Coating Technology Phaetus Proprietary Engineered for high-wear industrial components, this precision-applied coating enhances surface hardness and abrasion resistance on critical areas (nozzle tips/heatbreak throats), extending service life up to 2.5x.▇ 30-second QuickNozzle Replacement The Removable nozzle design reduces maintenance costs.▇ Hot Tightening Guide To ensure proper hotend function and prevent nozzle leakage during printing, always perform hot tightening when installing or replacing nozzles. Nozzles tightened cold may develop gaps due to metal expansion when heated, causing material leakage. CRITICAL SAFETY ALERT CAUTION: High Temperature Hazard! ​Nozzle, heater block, and surrounding components remain extremely hot during entire procedure. ​·NEVER make direct hand contact with heater block or nozzle ​·ALWAYS use proper tools ​·Wear heat-resistant gloves if close-range adjustment is needed▇ Ultimate Cooling Design ​Precision Manufacturing ​Stable Printing Innovative Cooling Structure Angled Dendritic ​ Extended Fins Expands cooling surface ​