Series 320 couplings feature the original high-flow valve design uponwhich all other CEJN pneumatic couplings are based. Their popularityhas made Series 320 a European standard. The series is easy-to-handle,one-hand operated and offers long service life. Male threads on thecouplings and nipples feature pre-applied thread sealant. This aluminumlightweight version offers extra low weight with the same qualityperformance as the standard version. And since aluminum is anon-ferrous material, Series 320 Aluminum couplings offer low magneticinterference and will not generate sparks.