Description:Item Name: Breathing valveMade of ABS material, durable to use

Mask accessories which should be used with mouth masks (not included)

Suitable for sports masks, running masks, active carbon masks, etc

Features: , Anti Haze, Mask AccessoriesSpecification:Material: PlasticInner Diameter: 27mm/1

06 inchSilicone Gasket: 24mm/0

94 inchPackage Includes:100 Pieces Breathing Valves