Chemical Light Holder for Yayen Easy to install with just one touch! By attaching it to your yaen, you can easily see the position and entrance angle and speed. Adopts a rear luminous system that is difficult to see from Aolica and is easy to see from anglers. It will not give Aolica a alert. You can also quickly know where the yaen is placed, so you can quickly respond to when you are in tightness and avoid damage to yaen due to steps. Chemical light is required separately. (Compatible with Chemihotaru 25) *Compatible with 316 and 327 types of devices available in our store (LUMICA), Chemiphortar 25 Mini, Lumika, Chemihotal X25, Hiromi Sangyo Miright. (Thickness 0.1 - 0.1 inch (2.9 - 3.0 mm) diameter); Product size (W x D x H): Approx. 0.4 x 1.1 inches (9.0 x 28.5 x 10.0 mm); Weight: Approx. 0.02 oz (0.5 g); Quantity: 3 pieces.