10mL/2.7 Dram Clear Glass Roll-On Essential Oil Bottles w/ SS Roller & Cap

The roller ball is unbelievable difficult to put in on almost all of them. The plastic of the roller is too much for the opening causing it to literally shred the plastic which makes it unable to go all the way down. A lot of the caps have permanent marks on them since I opened them. Unless you want bruises on your hands from shoving a plastic circle into a glass circle of the same size then don't buy these!!