Specification Brand : uxcell BulletPoint1 : Package Content - 5pcs shaft coupler diameter 3mm to 3mm, come with a key wrench for convenient use. Coupler Size: outside diameter 19mm x length 25mm. BulletPoint2 : Function: Shaft coupling is a type of coupling that connects two shafts together in order to transmit torque and rotational motion. BulletPoint3 : Material: This shaft coupling is made from quality aluminium alloy, lightweight and corrosion resistance, ensuring durability and long-lasting performance BulletPoint4 : Applications: Whether you need to connect motors, pumps, generators, or other rotating equipment, this aluminium alloy shaft coupling provides a reliable connection for efficient power transmission. BulletPoint5 : Easy Installation: With its simple design and included installation instructions, this shaft coupling can be easily installed without the need for special tools or professional assistance. ItemName : uxcell 5 Pcs Aluminum Alloy Shaft Coupling 3mm to 3mm, Flexible Coupling Motor Connector Joint, Stepper Motor Coupler for CNC Machine & 3D Printer (L25xD19) ItemPackageDimensions_Height : 0.79 inches ItemPackageDimensions_Length : 5.51 inches ItemPackageDimensions_Width : 3.94 inches ItemPackageQuantity : 5 ItemTypeKeyword : beam-couplings Manufacturer : uxcell NumberOfBoxes : 1 PartNumber : a24070900ux0253 ProductDescription : Function: Shaft coupling is a type of coupling that connects two shafts together in order to transmit torque and rotational motion. Material: This shaft coupling is made from quality aluminium alloy, lightweight and corrosion resistance, ensuring durability and long-lasting performance Easy Installation: With its simple design and included installation instructions, this shaft coupling can be easily installed without the need for special tools or professional assistance. Wide Range of Applications: Whether you need to connect motors, pumps, generators, or other rotating equipment, this aluminium alloy shaft coupling provides a reliable connection for efficient power transmission.