Fluoresentric's SimpleProbe® Oligonucleotide ONLY Service is for customers who only require SimpleProbe® Synthesis (14-30 bases, Single Fluorescein, SimpleProbe® chemistry, 3' blocker as needed). If you require an internal Fluorescein design, there is an additional $30.00 added into the cost of the Oligo. Make sure you click "Internal" under Probe Chemistry if you desire this feature. When entering the sequence, make sure you explain where to place the probe. For example: FAM-SP-XXXXXXXX-Por XXXXXXXXX-SP-FAM or XXXXX-FAM-SP-XXXXX (internal) Oligonucleotide probes are guaranteed (replacement only) for 10 days from the shipping date. Shipping is standard overnight following assay synthesis and QC. Orders over $400 qualify for free shipping. If you require QA/QC of your SimpleProbe®, we offer a SimpleProbe® Oligonucleotide QA/QC service as well.