Description: * brand new and high quality *Made of high quality material, durable and practical to use *Food grade silicone for health and safe use.Elastic for easy replacement. Specification: *Material: Silicone *Color: Blue (As Pictures Show) *Size: About 35*20*15mm(As Pictures Show) *Weight: About 5g *Inner diameter: 8mm *Outer diameter: 12mm Package Includes: 2 x Hydration Valve Nozzle Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.