Package including: you will get 30 pieces pour covers per package, so you will have enough products to cap your siphon jarsWide usage: it fits all kinds of airbrush bottles, so you don't worry about our product cannot useGood design: this airbrush cap keeps the air out, good for protecting your paint from being dry in the bottlesSize: each pour cover measures approx. 1.5 x 0.6 cm/ 0.59 x 0.23 inches (LW), it can be extended to fit your jarDurable material: this caps are made of quality silicone, which is flexile and durable, ensure you to use for a long time