Nipple:Copper material. Spoke Material: 304 stainless steel. The spoke length plus or minus tolerance is about 1MM. Spoke Dia. Spoke Color: Silver. Standard Length(MM) ≈ 58, 60, 62, 65, 70, 73, 75, 79, 80, 82, 85, 88, 90, 92, 94, 95, 98, 100, 103, 105, 108, 110,114, 115, 116, 117, 120, 125, 126, 128, 130, 132, 135, 136, 140, 142, 143, 145, 150, 152, 154, 155, 156, 158, 160, 163, 165, 166, 168, 170, 172, 175, 177, 180, 185, 190, 195, 198, 200, 204, 205, 207, 210, 212, 214, 215, 216, 220, 225, 227, 230, 234, 235, 237, 239, 240, 245, 250, 254, 255, 260, 263, 270, 280 etc. (tolerance of +- 1mm).