Viega PureFlow 1/2" PEX Crimp x 1/2" ProPress Transition Coupling (SKU: 44350) Its primary function is to

Its primary function is to provide a stable mounting point for pins or ramps in GRACO spray equipment

typically includes stainless steel

Carbon-filled (CF) PTFE packings (also referred to as 'Tuff Stack' in some documentation)

but specific material and intended use are not documented in available sources

Viega PureFlow 1/2" PEX Crimp x 1/2" ProPress Transition Coupling (SKU: 44350) Its primary function is toViega PureFlow 1 2" PEX Crimp x 1 2" ProPress Transition Coupling, Bronze, SKU 44350 This transition coupling is designed to connect Viega PureFlow PEX Crimp tubing to Viega ProPress copper piping systems, providing a reliable and lead free plumbing connection. Material: Constructed from durable bronze for corrosion resistance and longevity Connection Types: Features a 1 2" PureFlow PEX crimp connection on one end and a 1 2" ProPress press connection