For solo backpack sprayer (models 425,435). Includes: O-rings (0062291, 0062139, 0062140, 0062258), viton collar (4400189), valve plate (4061257 x 2), compression spring (0070260) and seal plug (4074350).
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.
