▸ 10 x XL Cotton Balls – High quality. Half is perfect for a 18mm / 20mm water barrier. Full is perfect for a 30mm test tube
▸ 15 x Small Cotton Balls – Standard quality. Perfect for test tube plugs, or 15mm/16mm water barrier.
▸ 10 x Cotton Q-Tips – Paper stems, high quality
XL cotton buds can be split in two easily by tearing down the middle