Buffered Peptone Water (BPW), Sterile, Ready to Use Pre Enrichment Media, 450mL Bottle, 20/Case. This sterile buffered peptone water is ready to use for microbial pre-enrichment, ensuring reliable and consistent results. The 450mL bottle size offers flexibility for various laboratory needs. Each case contains 20 bottles, ensuring ample supply for frequent testing. Ideal for microbiology labs, it is perfect for enriching a broad range of organisms.