Umarex CO2 ADAPTER for 2-12g CO2 Air Rifles. Adapter accepts two 12 gram CO2 cartridges to replace an 88 gram CO2 Cartridge Uses (2) 12 gram CO2 cartridges - Walmart.com
Umarex 12g CO2 Adapter Set Umarex 850 M2 Walther Lever Action CO2 Rifle 723364112843 | eBay
Walther CO2-Adapter
Umarex 12g CO2 Adapter Set | Airgun Depot
ADAPTER Walther/ 2x Co2- 12g - ADAPTERS Co2 - Co2 CARTRIDGES / GREEN GAS - Webshop - Import - Export E.R. Smets
Umarex 2X12-Gram CO2 Adapter | Umarex USA
Umarex Walther Co2 Adaptor - Airguns Europe
How To Fix A Leaking Walther 2X12g Co2 Adapter - YouTube