Patented NS4 Series 1/4" flow couplings feature non-spill valves in a compact size, at a great price. Use the NS4 when even a few drops pose problems regarding safety, media cost or environmental regulations. These innovative couplings are lightweight, chemically-resistant and easy to use. The non-spill design virtually eliminates spills, minimizes downtime and enhances operator safety. Temperature 32°F to 160°F Ok with vacuum to 120 PSI. Main components and valves: Glass-filled polypropylene and ABS. Thumb latch: Glass-filled polypropylene, ABS. Valve spring: 316 stainless steel. External spring: 316 stainless steel. O-rings: EPDM. Soft-touch over mold: polypropylene TPV (thermoplastic vulcanizate). This TPV is an alloy of polypropylene thermoplastic and fully vulcanized EPDM rubber. The material is typically resistant to water, acids and bases.) ABS has TPE (thermoplastic rlastomer) soft-touch over mold. Lubricants: Krytox® PFPE (inert). Panel hole .72" diameter. Color: Polypropylene - gray with dark gray over mold. ABS - white with teal over mold. PP can be special ordered with blue or red over mold. Contact us for quote.