Flexelene MFX Tubing This medical-grade tubing is soft, pliable, nonallergenic, noncytotoxic, and ultra-low in extractables. It is suitable for sterilization by E-beam, EtO and Gamma (tested to 25 kGy). Meets USP Class VI requirements. RoHS mpliant. 50 ft. Polyethylene Tubing, sorted by Tube Hardness, ascending.