earthtec 1/4 inch ucdbinj injection check valve replacement for stenner pump parts | fits for stenner duckbill check valve 45, 85, 100 & 170, classic, single head, s420, s128, s10p with ferrule & duckbill is up for auction in Industrial & Scientific. This item is in As Is condition. Bid on this item at our Georgetown - Triport Road location before the auction closes.