[m12]
Consumables: Metal processing. Inner Diameter, Outer Diameter, Thickness Inner Dia. NL8 - M8 8.7mm 13.5mm 2.5mm NL10 - M10 10.7mm 16.6mm 2.5mm NL12 - M12 13.0mm 19.5mm 2.5mm NL16 - M16 17.0mm 25.4mm 3.4mm NL20 - M20 21.4mm 30.7mm 3.4mm