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-PC4-M6 Fittings: thread M6, inner diameter (blue end) 4mm, suitable for the tube whose outer diameter is 4mm. PC4-M6 fittings are made of copper and plastic. Seal ring for Extruder help to prevent leakage. Heavy-duty and durable. -Easy to install and Quick to fix: Press and hold the blue or black part of the quick fitting and pull out the tube. Connecting by the outer thread of the quick fitting and convenient to disassemble. -Applicability and Compatibility: Widely used for connecting Bowden Extruder, PTFE fittings. Compatibility: Compatible with all 1.75mm PLA ABS 3D printer, works with Ender 2, Ender 3, Creality CR-10 , Monoprice Mini v2.0, MP mini select v2. Installation: connecting by the outer thread of the quick fitting Disassemble: pressing and holding blue or black oval of the quick fitting to release conveniently. Notice : small 3D printer accessories, please keep away from children.

-PC4-M10 Fittings: thread M10, inner diameter (black end) 4mm, suitable for the tube whose outer diameter is 4mm. PC4-M10 fittings are made of stainless steel and plastic. High hardness and Anti-corrosion. -Easy to install and Quick to fix: Press and hold the blue or black part of the quick fitting and pull out the tube. Connecting by the outer thread of the quick fitting and convenient to disassemble. -Applicability and Compatibility: Widely used for connecting Bowden Extruder, PTFE fittings. Compatibility: Compatible with all 1.75mm PLA ABS 3D printer, works with Ender 2, Ender 3, Creality CR-10, Monoprice Mini v2.0, MP mini select v2. Installation: connecting by the outer thread of the quick fitting Disassemble: pressing and holding blue or black oval of the quick fitting to release conveniently Notice: Small 3D printer accessories, please keep away from children.