the hose and the components inside

Desiccant refill (DAD-1)

and provides more structural integrity

See part# 42

High-Capacity Cooling System Reduced Downtime

Graco ChemSafe 1590 SPOOL/SLEEVE; assembly 0.086 (2.2) the hose and the componentsGracos ChemSafe pumps feature PTFE or UHMWPE (ultra high molecular weight polyethylene) corrosion resistant fluid paths, which make them ideal for corrosive and abrasive chemicals. Theres no exposed metals and they can be configured in various materials to meet most abrasion, temperature, and chemical compatibility requirements. Plus theyre dead head capable and achieve high flow rates while minimizing air consumption and operational noise.