Thank you for your interest in List Labs.
We manufacture and provide many different products. Some of the same products are packaged into different concentrations. To differentiate these products and their varying concentrations, we have assigned a 'letter' to the end the product #.
Product #190A - Tetanus Toxin from Clostridium tetani (25 µg)
Product #190B - Tetanus Toxin from Clostridium tetani (100 µg)
For products that are provided in a liquid form, the letter "L" is added to the end of the product #.
Product # 188L - Adenylate Cyclase Toxin, Recombinant from B pertussis (50 µg)
If you have additional inquiries, please feel free to continue your search in our Knowledge Base
or contact us with your question by submitting a support ticket here: https://listlabsinc.desk.com/customer/login?return_to=%2F