As an Amazon Associate, we earn from qualifying purchases. Harman XXV & XXV-TC Extension Spring - 3-31-2181 Harman . 3-31-2181 Gallery Attributes Brand name, Manufacturer name, ManufacturerHarman Extra Product NameHarman XXV & XXV-TC Extension Spring - 3-31-2181 keywordsharman, xxv, xxv-tc, xxv extension spring, xxv-tx extension spring, moq, multiple, tierMinQty11 MPN, SKU3-31-2181 qtyInStock5 snippetReplacement Extension Spring (3/4 x 4 x) for Harman XXV and XXV-TC pellet stoves. Harman part # 3-31-2181 tierPrice111.00 Distributor offers SellerSKUMOQIn stockMultiplePrices Stove Parts Unlimited3-31-21811511 @ $11.00