Capacity: 50 ml/1.69 oz; Material: Made from thick glass; This roller bottle set includes 4 pack roller bottles bottle with plastic roller ball and 2 pcs blue opener Rollerball design: These refillable roller ball bottles provide a smooth rolling action for easy application of oils and perfumes. The deodorant containers is easy to use and perfect for your daily or travel use Bottle size: bottles with black lids have a tight seal and are not easy to leak. The size of the bottle is about 37 x 116 mm/1.46 x 4.55 in, making it ideal for carrying around and putting in your bag without worrying about spillage Widely Usage: These roller bottles are versatile and can be used for a variety of liquids such as perfumes, cosmetics, essential oils, and DIY to meet different needs Easy to Refill: The empty perfume bottle containers are easy to clean and refill, Wide opening for easy storage of essential oils, perfumes. Enjoy the convenience of a refillable roller ball applicator Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Black Material:glass Package Contents: 4 * roller bottles bottle 2 * blue opener Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.