NALGENE* 65 BRAIDED PLATINUM-CURED SILICONE TUBING, FLEXIBLE, DURABLE, HIGH-PURITY TRANSLUCENT TUBING FEATURES INTERWOVEN POLYESTER BRAID FOR ADDED PRESSURE AND KINK RESISTANCE,DIMS: .250 ID X .520 OD(1/4" ID X APPROXIMATELY 1/2" OD, LENGTH: 100 FEET PER ROLL