The GRACO 111909 PLUG, BUTTON is a cap plug designed for use in GRACO spray equipment. Its material is not specified, but it is intended to securely seal or cover openings in GRACO sprayers, ensuring proper function and safety during operation. Key Features: Cap Plug 1.6 in x 1.55 in (4.064 cm x 3.937 cm) Compatible with various GRACO spray equipment models, including FinishPro II series Compact size for easy handling and installation Lightweight (0.03 lbs / 0.014 kg) Reliable sealing function Applications:Used to seal or cover openings in GRACO spray equipment, such as the FinishPro II airless/air-assisted sprayers, to prevent contamination and ensure safe operation. Installation Notes: Using genuine GRACO parts ensures proper fit, function, and safety within GRACO equipment. Ensure the equipment is powered off and depressurized before installation Align the plug with the opening and press firmly to secure Inspect for proper fit and absence of leaks after installation Regularly inspect the plug for wear or damage Replace if signs of deterioration are present