Assume you me banjo Copper washers on each side of the banjo or they will leak. Although I've always known banjo washers as copper ones.. they are pretty much the same thing, no?
Yup, that's what I put "banjo" :-0 lol, see this item here on eBay 231017686406 Includes Stainless Steel Braided Brake Lines Stainless Steel Banjo Bolts (if needed) Copper Crush Washers (if needed) Instruction Leaflet Lifetime Warranty
You will 100% need to install the banjos and washers for sure but personally I hate the HEL lines as they're always slightly too bloody long or they put the wrong connection on the line (I've had this more than once from eBay kits that customers supply). I have no 'enter' button at present so forgive the poor installation description but it basically goes... Banjo bolt > Copper washer > Brake line union > Copper washer > Into brake cal