It is a set product of Sumitomo 040 type DL/SL waterproof M terminal (M size) and wire seal (M size).
With the above combination
Compatible with AVS 0.75 wire.

●Applicable wire size of terminal
0.75-1.25 mm2 square millimeter
●Wire seal (M size) finished wire outer diameter
1.8-2.2 mm

● Sales of wire seal alone (sold separately)
”WS7165-0548DL-SL-BL”