This type can absorb both oxygen and carbon dioxide at the same time, and prevent food from spoilage and packing bag expansion caused by carbon dioxide produced by fermentation and maturation of food.
The 3D shape is designed according to the human face shape to ensure the tightness, to increase the breathing volume of the mask, to greatly improve the permeability, and to make wearing and exhaling more comfortable.
Din 338 standard HSS M2(6542) Twist Drill Bits, it is the high and middle quality, higher hardness than ordinary material, efficiency for metal, high temperature alloy, titanium alloy, high strength steel and carbon fiber composite materials, etc.
Din 338 standard HSS M35 Cobalt Straight Shank Twist Drill Bits, 5% Cobalt, it is the best quality, higher hardness than ordinary material, efficiency for Stainless steel, high temperature alloy, titanium alloy, high strength steel and carbon fiber compos