Aluminum Egg Cup Rail The product contains 50 3-in-1 ferrule bases. Thanks to the 3-in-1 ferrule base; You do not have to use the thimble body, thimble body support and egg cup apparatus separately. After preparing the 4 egg cup rails sent with the product in two rows for 1 frame or single row for 2 frames, as shown in the second picture, you can mount the 3-in-1 ferrule bases and start using the product. The 4 strikers (rail adapters) sent with the product provide easy mounting to the frame. It is compatible with all frames used in our country. Royal Jelly Collection Rail 9 Lu