This is a finger ramp that fits the Yamaha BB series. It is generally compatible with grades from BBP to BB734A and 234, as well as older models from 2025 to 5000 and V, but we have not confirmed all of them. We make both 4-string and 5-string versions. (The sizes are different, so please let us know the model after purchase.) Please choose from the following two specifications: ① ¥1,680 ② ¥2,480 (Free modification and exchange) ① Flat top surface with adjustable thickness (sides are rounded/beveled). We may also accommodate a simple arched top if necessary. ② Custom arched top that follows string height changes (also accommodates individual setting differences). For BB basses, the ② specification is generally a better fit, but recently more people are satisfied with ①, so we handle them separately. We can accommodate virtually all cases, including special asymmetrical designs. This is a custom-made product designed specifically to match the height setting of each string on your instrument, providing a tool that is easy to use even for those who have never used a ramp before. If you are unsure whether ① or ② is better, please consult us, and we will help you decide based on your individual settings (^^) The corners and edges are beveled or oval-shaped for a very smooth and comfortable feel. Additionally, the ② specification includes a seamless finger rest on the 4-string side, designed for ease of use with both picks and two-finger playing. (Depending on the designed thickness, it may not include a block.) We also sell a dedicated neck end slope. (Custom adjustment and production: ¥2,480 per unit) Discounts are available for set purchases, so please consider it (^^) As shown in the third photo, we have transitioned to the Ver7 type as the basic specification from December 2024. Please consult us in advance if you wish to purchase the old Ver5 specification. (Ver6 type is completely discontinued and not supported.)