Check the listing for details. 3D Printer Bulldog Extruder Compatible with E3D/ J-head/MK8 3D Printer. Condition: New. Listed at 30.99 USD. MK8 MK9 Extruder Feeder Device Left or Right hand for 1.75mm / 3.0mm Filament.2.89 USD1.99 USD3D Printer Ultimaker 2 Reprap Bowden Extruder Feeder Device With Drive Gear5.39 USD1.99 USD5Pcs UM2 Extruder Feeder Drive Gear Stainless Steel Bore 5mm Knurled Wheel Gear.3.99 USD0.99 USD2Pcs MK7 MK8 Extrusion Gear 26/36/38/40Tooth Brass/Steel Drive Gear Feeder Gear.2.59 USD2.99 USD3D Printer MK7 Extruder ABS Plastic Feeder Device Full Kit for 1.75mm Fliament.3.59 USD0.99 USD3D Printer MK8 MK9 Extruder Right/Left Hand Feeder device for 1.75mm filament.6.29 USD1.99 USD5Pcs Mk7 MK8 Extruder Feeder Gear Steel Half-teeth Bore 5mm 26/36T Feeder Wheel.4.59 USD0.99 USD3D Printer MK8 Extruder Bulldog All-metal feeder device for 1.75/3.00mm filament10.99 USD4.99 USD5Pcs MK7 MK8 Extruder Drive Gear Brass Half-teeth 26/40T Bore 5mm Feeder Wheel.2.99 USD0.99 USDReprap Mendel Extruder Gear Bore 5mm Squeeze Feed Wheel for 1.75/3.0mm Filament.1.79 USD0.99 USD5Pcs MK7/MK8 V-Groove Drive Gear Bore 5mm Wheel For Makerbot 1.75&3.0mm filament3.99 USD0.99 USD3D Printer Gear 22/26Tooth Bore 0.5mm OD11/12mm For Titan Extruder Feeder Parts.2.99 USD0.99 USD3D Printer New Metal Feeder Gear (Hardened steel) For Titan Aero Extruder Feeder3.99 USD0.99 USDMK9 Single Spray Injection Molding Extrusion Remote Kit for 1.75mm filament.3.19 USD0.99 USD Product Description Name：3D Printer Bulldog Extruder Upgrade Sliver 1.75/3.00mm for RepRap Prusa i3 Kossel Gear：stainless steel with Bore 5mm, out diameter 12mm, 40 teethApplication：Nema 17 42 Stepper MotorMaterial：Aliuminum All-metalFliament：1.75mm or 3.00mmBall bearing：Bore 6mmStepper Motor : 1. Size: 42*42*40mmStepper Motor Parameter:Note: Hello, thanks for you buy our product. When you buy our motor or extruder what we needs to be informed for you in advance is that we did a test and found that the wire sequence of our motor cable is different from that of other motors. If we don’t use our matching motor cable, there will only be vibration and sound, but no rotation. So please use it with the cable which we send together with you. Please confirm your machine before purchasing whether it is convenient to change the cable, thank you.Package List: 1 x Bulldog Extruder Feeder device kit and 1 x NEMA 17 Stepper Motor. Payment 1. We accept payment via PAYPAL ONLY.2. Payment must be made within 7 days of auction closing. (Non-payment may result in a UPI (Unpaid Item) being put on your account. Ebay will automatically close your account if you accumulate 4 UPI's total. ) If you placed an order you no longer needed, you can contact me to cancel. 3. Total Amount Due includes the final auction price plus S&H(Shipping and Handling). 4. S&H will be determined based upon the SHIP TO address. ( S&H does not include customs or any other importation fees). Shipping 1. Handling time: 3 business days.2. Tracking number: "Economic shipping" without whole tracking information, "Standard shipping" with whole tracking information.3. Delivery time of "Economic shipping" and "Standard shipping":Return&Refund 1. The returns should be returned with our original packages. 2. Defective products must be returned within 30 days. 3. Customers must contact us first for the return address. 4.In all cases, buyers pay for the shipping fees at their own cost to return products for exchange or refund. We will be responsible for the postage of replacements.5. Please kindly feel free to contact us first, if you receive the items with quality problems or damaged, we would like to offer replacement or refund service for you.Contact us 1.Your better feedback will be an encouragement for us to offer the better quality and the better service in future.2.If you are not satisfied with them, please contact us first via Contact Seller. Your messages will be answered within 1-2 business day. We shall try our best to solve your problem to your satisfaction.