The 19L N-type PE supply tube is designed for use with matching liner bags. Injection moulded in one piece from ultra-high-purity PE, it suits transfer of non-highly-corrosive electronic reagents. Production passes strict dual testing for particle and metal leaching and will not contaminate photoresist ancillary media. A side hole at the top of the tube balances pressure, preventing the liner bag from being sucked flat and blocking flow during extraction, and the base uses an FKM fluoroelastomer sealing ring for a tight, leak-free seal. The standardised connector fits workshop automated feeding lines — an economical transfer component for medium-batch mild high-purity chemicals.