to avoid fraying and tearing in cold weather conditions

grass and gravel from being tracked into your work area

tap the piston head with a light hammer until the piston moves down the tool body (which tells you the clog has come free)

3/4" GHT male x 3/4" GHT female

3M Head Harness for Ultimate FX Respirator 4-2 QJ98592 to avoid fraying and tearingMaintain the effectiveness of your 3M Ultimate FX Respirator with this durable head harness replacement. Specifically designed for use with FF 401, FF 402, and FF 403 models, it preserves the original performance standards of your facepiece. This replacement part offers a practical solution for extending the life of your respiratory equipment and saving costs.