Can be attached to reels marked as compatible with Daiwa S-series knobs. This is a modified part for the Small S30. Diameter: 30mm, Weight: 17 grams. Please check the manufacturer's website for detailed compatible models. This is a used item, so there may be some minor scratches, but it is in good condition. Washer set included. Price negotiations are not accepted. We do not offer holds. Thank you for your understanding.