Product description:
Drive Module Board Size: 2.8 x 2.8 x 2 cm
Stepper motor Size: 3.2 x 3.2 cm
Rated Voltage: DC5V 4-phase
Insulation Resistance: >10MΩ (500V)
Temperature Rise:
Insulation Grade: A
Dielectric Strength: 600V AC / 1mA / 1s
Step angle: 5.625 x 1/64
No-load Pull in Frequency: >600Hz
No-load Pull out Frequency: >1000Hz
DC Resistance: 200Ω±7% (25C)
Reduction ratio: 1/64
Pull in Torque: >34.3mN.m(120Hz)
Detent Torque: >34.3mN.m

Package include:
6 x ULN2003 Drive Module Board
6 x 28BYJ-48 Stepper motor