*No purchase necessary. This item is available to customers in Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Hungary, Italy, Netherlands, Norway, Poland, Slovakia, South Africa, Spain, Sweden, Switzerland and the UK who submit a completed request form. Limit 1 free guide per customer. Please allow 2-4 weeks for delivery of printed item if requested. By submitting the request form, you warrant that you are not prohibited by employment, contract, or law from receiving this item from Thermo Fisher Scientific. Other restrictions may apply.