In addition to the 4000 series, there are high-end 4 100 series, but the 4 100 series only has 4 106 and 4 107, and the specifications are the same as those of 4006 and 4007.
The number 30 in the above picture is a demonstration version, which is the size of a standard household kitchen knife. There are two kinds of kitchen knives, CM4030 and SF4030. The difference is that CM weighs 3 10G and SF weighs 350G. 2.5 mm at CM end and 4.0mm； at SF end; CM is Cr-Mo alloy steel and SF is carbon steel.
Finally, there is a No.5 and No.4040 all-carbon steel thin blade, the size is 190mm×65mm, the blade thickness is 1.5 (tip) -2.5 (end) mm, and the material is carbon steel, which is called Beijing ダックク.
The above are the common models of shirt kitchen knives. Please forgive me if there is any mistake or incompleteness.