Check the listing for details. Black Powder CVA Derringer Sear Spring (with the side tab). Listed at 10.99 USD. You will get the sear spring in the picturesCVA Derringer lock sear spring. These sear springs were made in Spain so they might fit others too. Some derringer sear springs have a tab on the side that locks into the lock plate. This sear spring listing has that tab. I do have them listed on Ebay that don't have that tab. This is a stock picture. You might not receive the item pictured, although yours will be identical. SHIPPING NOTE: I try to ship 1 to 2 days after receiving cleared payment. According to the Post Office, first class mail could take 2 to 5 days. REFUND POLICY: If you are not happy with your item I will cheerfully refund your purchase price, only. We can not refund shipping. All we ask is that you return your item in the same condition you received it in, and you are responsible for return shipping. By bidding on, and purchasing this product you agree to hold harmless Pat's Enterprise LLC from any and all claims arising from the use of this product. NOTE: This part goes on a muzzleloader, blackpowder gun.