Brass Filter: Filters out particulates from the gas Inflatable nozzle filter: filter out particulate matter when gas is filled Luminous pressure gauge: up to 4500PSI pressure value can be displayed Silicone mouthpiece: food-grade safety certified material, non-toxic and odorless Model: X3000 (0.5L) Air capacity: 100L (compressed air) Breathing duration: 7-10 minutes (depending on individual vital capacity) Colour:Yellow Material:Aluminum alloy+Polyester Package Contents: 1x X3000 respirator(without gas) 1x storage bag 1x slip rope 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.