Top high quality from HS Sprenger Germany kk conrad ultra Aurigan Vienna Bit
Aurigan (85% copper, 4% Silicon, rest zinc)
You can find the exact description at Sprenger
size 5. 1/8 (130 mm), the size between the rings is 134 mm
thickness 18 mm,
with stainless steel rings 70mm
its only test, with lightly tracks
its in a very good condition
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Insured dispatch to UK and europe