The GRACO 4-411-03 is a precision-engineered replacement piston designed for use in E & ER series spray guns. It is crafted to ensure optimal performance and durability, playing a crucial role in the operation of GRACO spray equipment. The specific material is not explicitly stated in available sources, but similar GRACO pistons are often made from high-grade metals or engineered polymers for wear resistance and longevity.

Key Features:

• Piston
• E & ER Gun
• Designed for GRACO E & ER series spray guns
• Precision fit for optimal performance
• Designed for reliability and long service life
• Ease of maintenance (as a replacement part)

Applications:
Used as a replacement piston in GRACO E & ER series spray guns for fluid dispensing and spray applications in industrial, maintenance, and lubrication settings.

Installation Notes:

• Using a genuine GRACO piston ensures compatibility, reliability, and optimal performance of the spray gun, reducing the risk of equipment failure and downtime.
• Always disconnect the spray gun from power and fluid sources before installation.
• Follow the manufacturer’s instructions for disassembly and reassembly.
• Inspect the piston and related components for wear or damage during replacement.
• Ensure proper lubrication of moving parts as recommended by GRACO.