Durable construction: made of durable material for long-lasting performance and reliable service life. Thread conversion for easy refilling: converts the trapezoidal thread of s tream cylinders to bottle thread W8 (DIN 477 No. 6), so you can attach a standard regulator directly to a 425 g / 60 L s tream cylinder without modifying the regulator or cylinder. Secure, straightforward installation: fits between the reducer (regulator) and the s tream cylinder and tightens to create a secure connection; installation is simple and stable for routine use. Adjustable internal valve needle: the internal valve needle is adjustable to accommodate different cartridge valve versions, increasing compatibility with a range of s tream cartridges and regulators. Key benefits at a glance: Avoids the need to buy a dedicated regulator for s tream cylinders. Lets you use existing standard regulators with 425 g / 60 L s tream cylinders. Simplifies field refills and reduces downtime by enabling direct connections. Typical use scenarios: Camping and outdoor cooking: connect your standard regulator to a 425 g / 60 L s tream fuel cylinder to refill or run portable stoves and heaters. Workshop and on-site repairs: adapt existing regulators to s tream cartridges for soldering torches, small burners, or maintenance tasks. Equipment compatibility checks: test and service portable gas appliances that use different cartridge valve versions by adjusting the internal valve needle for maximum fit. Specifications and compatibility: Converts trapezoidal s tream cylinder thread to bottle thread W8 (DIN 477 No. 6) For use with standard regulators and standard 425 g / 60 L s tream cylinders Adjustable internal valve needle to fit multiple valve versions This adapter is intended as a practical, compatible solution for users who need to connect standard regulators to 425 g / 60 L s tream cylinders while maintaining a secure, adjustable connection.