Short story is two chains for Ozito 18 Volt chainsaw PXCCSS-018 are for sale. One is an Ozito, the other is a Stihl which I had made by a Stihl dealer
They are 40 DL, 3/8 LP 0.043inch
Long story is I bought an Ozito 18 V 10 inch (250mm) chainsaw which worked well for cutting small branches until the motor burnt out with lots of smoke. The replacement just stopped working, and after three others gave up I upgraded to the 2 X 18 V version which is working well.
The Ozito chain is dull but only used for maybe half an hour. The Stihl is sharp and has hardly had any use.