These are GOTOH tuners for a 5-string bass, with a L4-R1 configuration. They are from the lightweight RES-O-LITE series, effective in counteracting neck dive. I purchased these in April 2025 and used them on a 5-string bass, but I'm selling them because I've returned the bass to its original tuners. I only used them at home after purchase; they were never used outside the house. They are sold at Soundhouse for 18,800 yen (special order), and even just the L4 set is sold for 14,800 yen (special order). Manufacturer's product page: http://g-gotoh.com/product/gb350/ Dimensions: http://g-gotoh.com/ja/wp-content/uploads/2016/01/gb350-dim.jpg