3/8 ID x 1/2 OD x 100 Feet Hydromaxx Flexible PVC Clear Vinyl Tubing. BPA Free and Non Toxic Crystal clear and smooth, Shore A Hardness Resistant to Chemicals, Non-marking, non-conductive and silicone free Smooth Inside and Outside - Allows Unrestricted Flow Non-Toxic PVC Tubing Can be Steam Sterilized Manufactured to FDA and USDA Standards