Retro Tape Cassette Charms - Tibetan Antique Silver tone Great Charms for Retro gifts £1.85 Quantity: at £1.85 each Add To Basket 5 in stock. Lead Free Silver tone Metal Tape cassette Charms that are ideal for retro projects. 20mm approx with a 1.5mm hole, so this charm would need a jump ring adding before using for most projects. Great jewellery making supplies. Please note that Antique Silver has a slightly blackened look and this perfectly normal.