Round rod saddles for YAMAHA dynamic guitars. This product is a set of 3, with 2mm, 3mm, and 4mm diameter brass rods. Cut to a length of approximately 81mm to match the bridge groove length of dynamic guitars, with chamfered ends. Due to being cut by hand one by one, there may be slight variations in length (approximately 0.5-1mm). Brass is a relatively hard material, so it increases sustain and produces a hard, clear, and crisp sound. Cut to a length of approximately 81mm to match the bridge groove length of dynamic guitars, with chamfered ends. Due to being cut by hand one by one, there may be slight variations in length (approximately 0.5-1mm). 【Reference Hardness】 Aluminum < Copper < Brass < Stainless Steel < Piano Wire Aluminum is the closest material in hardness and specific gravity to the cow bone commonly used for guitar saddles. If you prefer a sound similar to cow bone, we recommend trying aluminum. 【Reference Weight (81mm length)】 Aluminum 2mm diameter / 0.68g 3mm diameter / 1.57g 4mm diameter / 2.75g Stainless Steel 2mm diameter / 2.00g 3mm diameter / 4.48g 4mm diameter / 7.98g Brass 2mm diameter / 2.10g 3mm diameter / 4.86g 4mm diameter / 8.65g Copper 2mm diameter / 2.26g 3mm diameter / 5.05g 4mm diameter / 9.10g Piano Wire 1.5mm diameter / 1.11g 2mm diameter / 2.00g *Please note that there may be slight individual variations.