Silform offer a wide range of biological stains for use in microscopy at very competitive prices. To avoid confusion and to ensure the correct product is being supplied, please heed the following warning. Indicators and Biological Stains: Some products appear in both lists but are not necessarily interchangeable and care should be taken to properly identify the product required at the time of ordering. When a product appears in both lists and is completely interchangeable, there is no suffix after the product name. When a product appears in both lists but different “forms” are required, the product will carry a suffix either “IND” or “B.S.” and has a different catalogue number. When ordering, please ensure catalogue numbers and suffixes are included for correct identification by warehouse staff when preparing your order.