I have 3 Kg of 1966 Australian Round Fifty Cent Pieces They are 80% Silver and each Coin contains 0.34 Troy Oz of Silver I have them in Tubes of 48 because 48 x 0.34 = 1/2 kg (510 grams) or 16.4 Troy Oz If you prefer, I can put 50 per tube, 50 x 0.34 = 531 grams or 17.08 Troy Oz Tube of 48 - $720 Tube of 50 - $750 Free Express Postage with Signature