I am selling violin pegs I purchased from a shop on Mercari, but they don't fit my violin. I opened one for inspection, and the rest are unopened, as they were when purchased. Here is the product description: Easy Pegs Smart Pegs for Violin 'Rakumaki' (Easy Winding) - Set of 4 Eliminates the root cause of loosening! Tuning is spot on! Lightweight! 9g/peg No maintenance required! Can be used with existing peg holes! Features of the patented non-loosening "Rakumaki" pegs: We calculated the necessary braking force from the string tension and incorporated it into "Rakumaki." As a result: - Pegs can be turned lightly. - The small diameter of the peg shaft provides good tuning accuracy. - Does not loosen during performance. - High-strength and compact components make it durable. - No adjustments or replacements needed even after long-term use. "Rakumaki" violin pegs can be installed (lightly glued) using the existing peg holes. The dimensions d1 and d2 of this product are as follows, so please be sure to check the size of your violin's peg holes before purchasing. Please note that we cannot accept returns or exchanges. d1 7.2mm d2 7.5mm Please forgive minor scratches and color unevenness due to handmade nature. Knob: Resin Φ20 Base: Resin Winding Shaft: Brass Φ4 Accessories: Adhesive, Support Ring #violinpegs #pegs #non-loosening #doesnotloosen #zeromaintenance