EU Orders under £125 (€150)- As a registered IOSS company, EU orders include VAT avoiding additional charges and delays for the customer at Customs entry.
EU Orders over £125 (€150) or for EU business customers - the VAT will be refunded before goods are dispatched. Please note, VAT and duty may be charged direct to the customer at customs entry by the shipping company. EU business user accounts can be upgraded to be automatically VAT exempt on request.
We do not publish figures for deflection like this. As they are so low cost, probably best to buy a few different sizes and carry out your own experiments on say 4, 5 or even 6mm silver steel. Gut feel is that 4mm is too small.