Specification:<br />Material: Thick Glass+Glass roller balls<br />Size:<br />3ml:<br />Diameter:1.5cm<br />Length:5.5cm<br />10ml:<br />Diameter:1.5cm<br />Length:10cm<br />Usage:use to load essential oil， vegetable oil， essence， perfume， etc.<br /><br />Features:<br />* Made of high quality thick glass，l delicate workmanship，light weight and corrosion resistance.<br />* Steel ball is made of high quality steel ， tightly wrapped and glide smoothly， only give oil when rolling the steel ball， don't worry about it will leak.<br />* Small volume， light weight， convenient to carry.<br /><br />Package includes:<br />1x Empty Glass Bottles