This 1PC Pneumatic Fittings set is designed for PY/PU/PV/PE water pipes and pipe connectors, featuring direct thrust operation for hose sizes from 4 to 16 mm and PK hose quick couplings xiaguolingsm (SA,10mm) Sa 10mm. Key benefits Fast, easy connections: direct thrust design enables straightforward pushin assembly for quick setup and changes. Broad hose compatibility: supports PY, PU, PV, and PE water pipes, accommodating common plastic hose materials. Versatile size range: suitable for hose diameters from 4 to 16 mm, covering a wide range of applications. Quick disconnect capability: PK hose quick couplings allow fast tool or line changes with minimal downtime. Compact, singlepiece design: simplifies installation and reduces potential leak points. Key attributes Type: pneumatic fittings and pipe connectors Hose compatibility: PY / PU / PV / PE water pipes Size range: 4 to 16 mm Connection style: direct thrust Couplings: PK hose quick couplings xiaguolingsm Size designation: SA, 10 mm (Sa 10 mm) Package quantity: 1 piece (1PC) Brand/model reference in title: xiaguolingsm (SA, 10 mm) Sa 10 mm Applications and use cases DIY and workshop pneumatic lines: connect and disconnect air hoses quickly for tools and equipment that use 4–16 mm hoses. Small water piping projects: install or water lines with PY/PU/PV/PE materials that require a direct thrust connection. Quickchange hose assemblies: use PK hose quick couplings for rapid tool changes or line reconfiguration in compact systems or testing setups. Notes Verify hose material compatibility (PY/PU/PV/PE) before assembly. Ensure correct 4–16 mm hose sizing to achieve proper seating and a secure connection. This item specifies 1 piece and the xiaguolingsm SA 10 mm / Sa 10 mm designation as described in the product title.