Check the listing for details. Estes Standard Engine Plugs, for Rocket Engines, (40pcs). Condition: New. Listed at 4.99 USD. New in package Estes Standard Engine Plugs, for Rocket Engines, (40pcs) (EST2251) Need extra Starter Plugs? You’ve put them away and can’t find them or you’ve lost them? Regardless of the reason, we’ve got you covered now! Included are 20 each of the yellow plugs for 1/2A6, A8 and B4 standard engines and magenta plugs for B6 and C6 standard engines. Features:Use with all standard engines Includes:20 yellow plugs20 magenta plugs Estes model rocketry is recommended for boys and girls ages 10+ with adult supervision for those under 12, and rocketeers of all ages. Vehicle models vary. We DO NOT guarantee this will fit the vehicle specified in this listing!Verify that this item is appropriate for your vehicle. Consult your manual or vehicle manufacturer.Verify vehicle fit-ment before purchase.Returns will only be accepted on items that are returned in new, factory-sealed packaging. Used, damaged (unless damaged when it arrived to you), and opened items will not receive a full refund. Any and all warranty claims will be handled through the manufacturer directly.