NS1 Series couplings closed-system design is packed full of features that ensure drip-free disconnects, eliminate the need to purge air from the system and allow tubing to move freely without kinks. The smallest plastic non-spill coupling on the market, NS1 is ideal for applications with tubing from 1/8-inch and smaller that need to be connected and disconnected often. The ergonomic, user-friendly interface of NS1 enables a secure, reliable connect and disconnect.