The European Commission has imposed fines on four multinationals for price fixing and market sharing in relation to chloroprene rubber. This product is a synthetic rubber used in a wide range of industrial products, such as the production of diving equipment, condoms, inner shoe soles and adhesive. One participant in the cartel would have received a fine of EUR 201 million but successfully obtained full immunity as the whistleblower. Two companies were granted reductions of 50 per cent and 25 per cent respectively under the Commission’s leniency programme. Under the Commission’s 2006 Fining Guidelines, applied here, increases of up to 100 per cent can be made for each past infringement (both national and EU-wide). An increase of 60 per cent was factored into the fine on one company due to past cartel infringement.