Nov design E-type titanium unit set will help improve straightening the bike when folding. Many people found after removing the mud guard, the bike can not stand straight after folding, as shown on picture 3, but after installing the E-type Titanium unit set, it will help the bike to stand straight, as shown on picture 4. This is for Brompton without mudguards. Material : titanium +aluminium. One set Include a titanium frame, a titanium bolt and 2 aluminium washers. Weight: 6g (+/-0.5g).