Easy to use, liquid-tight Teflon seal permits sampling to within ½ in. of drum bottom. Prescored for disposal after a single use, or unscored for repeated use. When sample has been collected, lower and press lightly on the inner tube, which positively seats the Teflon seal, locking the sample column into place. Unit is 7/8 in. x 42 in. long and has a tapered bottom with approximately ½ in. diameter opening. Sample capacity of 200mL.