PP or ETFE. Use these barbed adapters to connect peristaltic-type flexible tubing for general, low pressure applications, such as plumbing Ismatec® peristaltic pumps. Due to the low melting point of PP, these adapters are not autoclavable, however, they can be sterilised via gamma radiation. The ETFE connectors have superiour solvent resistance and a higher temperature rating (80 °C).