Material: 45 Steel, hardened by heat treatment, and then electroplated

3mm, 3.17mm, 4mm, 5mm, 6mm, 6.35mm
Inner Diameter: 3mm, 3.17mm, 4mm, 5mm, 6mm, 6.35mm
Cylindrical Diameter: 10mm
Cylinder Height: 10mm
Baseplate Diameter: 22mm
Total Height: 12mm
Side Fixed Hole Screw: M3
Baseplate Hole Diameter: 3mm
Diagonal Screw Hole Distance: 16mm

7mm, 8mm
Inner Diameter: 7mm, 8mm
Cylindrical Diameter: 16mm
Cylinder Height: 10mm
Baseplate Diameter: 32mm
Total Height: 13mm
Side Fixed Hole Screw: M4
Baseplate Hole Diameter: 4mm
Diagonal Screw Hole Distance: 24mm

10mm, 11mm, 12mm
Inner Diameter: 10mm, 11mm, 12mm
Cylindrical Diameter: 18mm
Cylinder Height: 10mm
Baseplate Diameter: 32mm
Total Height: 13mm
Side Fixed Hole Screw: M4
Baseplate Hole Diameter: 4mm
Diagonal Screw Hole Distance: 24mm

package list:
1 pcs flange coupling
1 pcs L shape wrench