Kobalt 80V String Trimmer Bump Knob Assembly $3 + Free Pickup

Kobalt 80V String Trimmer Bump Knob Assembly $2.98 + Free Pickup. Lowe's has Kobalt 80V String Trimmer Bump Knob Assembly (2908503) on sale for $2.98. Select free store pickup where available, otherwise shipping is free on orders $35+ for MyLowe's Rewards Members (free to join). Features: Replacement bump knob assembly for Kobalt 80V string trimmers, compatible with Kobalt 80V string trimmer models 623432 and 620250.