ball main bearing underneath Is52/40 mm black

Pro ball bearing below These headset have a double sealed bearing and cups of anodized aluminum alloy. Comes with Gap Cap. The bearings are made of high quality steel. Specifications: Color: black Material: steel Inch size: 1.5 inch head tube, 1 1/8 inch steering tube Front fork diameter: 40 mm Construction: integrated (IS) Weight: 49 grams (bearing only) Content: 1 Cartridge headset underneath 1 Gap Cap