The 2GT Belt is a timing belt built with Neoprene rubber with fiberglass core  and having width of 6mm. It is suitable for 3D printers.

The 3D Fan With Holder  is a holder that comes with a fan of power 12V. It comes with a30mm fan for cooling. It is useful in computer case and other DIY projects. It is suitable for J-head 3D structure,one cooling fan and holder.

The Nozzle 0.4 mm is a extruder brass nozzle print head . It is suitable for Spray, Oil injection, Flame plating and many more.

The material of this product made it easy to load and unload too. It is not easy to damage. (directly put the fan cover on the radiator, gently press can complete the installation). For better hold of the radiator, it has an inner wall with a card mark. It has a unique surround type design that has close contact with the radiator made the wind trapped in the radiator, preventing the heating block from heating. It is designed funnel-shaped to strengthen the wind of the fan and achieve good heat dissipation.
 

It is known as "mature glass". It completely meets the international environmental protection test standard. High-temperature resistance and not easy to deform. This is not possible with ordinary glass or tempered glass Low coefficient of expansion, high softening point, and good thermal conductivity.  It does not break due to thermal expansion and contraction. It has a flat and smooth surface and also durable to use too.

The 20 cm Threaded Rod is a Stainless Lead CNC Linear Shaft Rail Screw Rod of 200 mm total length. It has a pitch and diameter of 2 mm and 8 mm respectively. It has various features like: - Durable and easy to use, used in stepper motor, Machine Tool, and other equipment, direct connected to bearing , stainless function and many more. It can be suitable for 3D printers, engraving machine, XYZ module, slider, lifts etc. It is also useful for many CNC projects as well.

The 3D Printer Motor Coupling is a 5 mm to 8 mm Shaft Coupling Aluminum Alloy Stepper Motor Coupler Joint Connector Module. It has a feature of flexibility which removes stress between the motor and driving components. It is suitable for application like: -CNC machines encoding, 3D printers Z shaft coupling which simplifies the debugging difficulties.

NEMA 17  Stepper Motor BIG is for 3D printer applications and CNC applications and other various applications too. This device demands low speed with high precision. It is used in many machines such as 3D Printers, CNC Router and Mills, Camera Platforms, XYZ Plotters, etc. Nema17 4 wire Bipolar Stepper Motor is High precision 4–wire bipolar stepper motor, size in Nema 17, 1.8 deg. step angle (200 … It is one of most parameters for the stepper motor. Users can use the A4988 or drv8825 driver to run this motor.

Small Stepper motor (High torque) for applications like Micromouse.

Features:

• Tapped Holes on 4 corners.
• 12V 0.3Amp in bipolar mode.
• Weight : 220 gm
• Dimensions :42 x 42 x 34 mm
• 5 mm Standard Shaft 24 mm length
• Torque 3.1kgcm
• Ideal for micromouse due to its low weight to torque ratio.

Usage:

• Connect +ve to 2 Common wire and drive 4 coils with drivers such as ULN2003/ULN2803 for driving in Unipolar mode. This ic's will not work directly with this motor since current capacity is less. However 2 in parallel can drive this motors.
• Connect H-bridge / Chopper Drive to 4 wires to use in Bipolar mode.

Wiring Details:

• A+ = Blue
• A- = Yellow
• B+ = Red
• B- = Green

Package Includes:

• 1 x NEMA17 HIGH TORQUE STEPPER MOTOR SMALL

It has a high-quality shiny surface appearance and robust construction, longer working life. The rounded teeth of this tooth and belt are engaged together longer providing a smoother transition between teeth, good performance for 3D printers. It is applicable in the 3D printers, CNC, and other robotics with timing belt pulley, GT2 timing belt pulley system especially suited for linear movement and positioning, and it’s good for GT2 6mm Width Belt.

The Rod Holder Old is a SK8 Anodized Aluminum Alloy material made Rod Holder Module. It is designed for use in small Numerical control machines, linear stages, 3D printers and other devices using 8mm diameter linear shafts.

These linear bearings need to be press-fit into the object you would like to slide on your rail or shaft. The outside diameter is 21mm so the hole you drill should be no bigger than that. The press-fit can't be too tight though or the bearing will not slide properly on the shaft, if the bearing won't go in via an arbor press then you will need to drill out the hole slightly larger. If the fit is a bit loose then you can just use some red Loctite to lock things in place.