its always worth throwing things open to a wider community so :-
here an interesting little item, they look hand molded around a copper tube containing solder.
any ideas as to a potential composition ?
apparently they are rock hard and "burn" with a distinctive odour
see at ~6-46
some of us in the uk (on pyrogear) are trying to copy them just from pure interest.
Edited by dave321, 03 July 2020 - 09:22 AM.