Brand Features: Prevents a flame from traveling past the flashback arrestor in the event of a flashback. Acetylene liquefied gas propane flashback arrestor can be used for acetylene gas, coal gas, liquefied gas, and propane. Oxygen fuel flashback arrestor can be used only for oxygen. Compatible with 10mm or 8mm pipe (available in two versions). Basic style, slightly different from the professional export version. Includes 2 pcs pipe flashback arrestors only; other accessories shown in the picture are not included. Specifications: Types: Acetylene liquefied gas propane flashback arrestor, Oxygen fuel flashback arrestor Fitment for: 8mm pipe, 10mm pipe Material: Copper Dimensions: Length: 78mm / 3.07 inches Color: Red, Blue Quantity: 2 pcs Note: 1. Please allow 0-1cm error due to manual measurement. Please ensure you are comfortable with this before purchasing. 2. Due to differences between monitor displays, the picture may not reflect the actual color of the item. Thank you! Package includes: 2 x Pipe Flashback Arrestors