Made using skateboard decks. Three different decks were used to create the curves and patterns. The inner diameter is 13mm, and the depth is 92mm. For easy visualization, it's attached to a Brightliver Ice Pod. The left and right sides have different colors, making it twice as enjoyable. This product includes the grip only. For skateboard enthusiasts, street culture lovers, and those who want to enjoy fishing in a unique way, please give it a try!