The entire products solid on this site are made to the highest quality to comply with European standards. Were we offer stainless steel it’s generally 304 grade stainless steel unless stated. The finish is satin or polished. Tube thickness is 1mm. Sash locks face plate is 304 stainless steel. Where there is a need for cylinders our locks are cut to fit standard European style cylinders. Door stops are solid stainless steel. Our pull handles are made from 1.6mm thick tube. We are importers and work directly with our suppliers to bring the very highest quality products to the UK market. We welcome enquiries for wholesale or bulk buying. We can also offer branding of boxes and your own product codes this is only offered on large volume shipped direct to your warehouse. If the items are not listed on our shop please enquire as we have access to thousands of product and we only show or sell on this shop our best sellers. Email your enquire to quotes@infinity-glass.co.uk