A unique, patented, 2-piece venting assembly prevents pressure build-up of solvents within the wash bottle, eliminating solvent drips from the spout due to internal evaporation. Wash bottles are labeled with six of the most commonly used solvents. Bottles are low-density polyethylene; closures and venting assembly are polypropylene. Note: Use only with solvents compatible with LDPE. 500 mL (16 oz) capacity. 3 per pack.