Home / Repair Parts / Armstrong Parts / Armstrong Part #D251921-000, Stuffing box extension gasket Armstrong Part #D251921-000, Stuffing box extension gasket$4.96 Armstrong Part #D251921-000, Stuffing box extension gasket quantity Add to cart SKU: D251921-000 Category: Armstrong Parts Description Additional information Description Armstrong Part Number D251921-000, gasket vel stfg box ext grp-M Additional information Weight 3 lbs