A flow-thru borosilicate coil for continuous radiation of small (as little as 175 mL) or large samples. Coil comes without jacket when heating of sample is not a concern because of the higher flow rate. Coil is 12.7 mm O.D. x 8.0 mm (5/16") I.D. with 1/2" Swagelok ends, 16 ±1 turns with approximate capacity of 175 mL, maximum flow rate of 10 L/min.