Heiniger Sharpening Service EnvelopeEssential service for precise and long lasting clipping results Professional blade sharpening by HEINIGER Pre paid envelope simple and quick to use Can be used to send: 1 blade set, 2 top blades, 2 bottom blades, or one cutting head Simply place the items in the envelope and send it back Remember to include the sender's full contact details Sharpened blades returned within 48 hours (excluding postal transit times)