The estimated delivery time for this product is 7-9 days #Coupling #D14L25 #5x5 #5x8 #6x8 #8x8mm #Shaft #CNC #Coupler #Aluminium #Alloy D14L25 CNC aluminum alloy shaft coupling 5x5 5x8 6x8 8x8mm Features: 100% brand new and high-quality Dimensions: 14 x 25mm/0.55 x 0.98 inches (length x outer length). Compatible with 42mm stepper motors. Relieve stress when the axis is not fully aligned. Connect two shafts with different diameters, or connect to motor shafts, or connect shafts with different diameters. Suitable for 3D printers, engine couplings, ship models, car models, aircraft models, etc. Specification: Interface size: approximately 5x5mm/5x8mm/6x8mm/8x8mm Material: Aluminum alloy Quantity: 1 product Color: Blue Applicable to: 42mm stepper motor (3D printer) Package includes: 1 motor coupling for 3D printer Attention: Due to issues with lighting effects and shooting angles, the product will have certain tolerances. Please understand. Please allow manual measurement to produce a 0-1cm error.