Product Name: T Slot BoltMaterial: MetalMain Color: Silver Thread Size: M8Head Size: 18 x eight x 6mm/0.71 inch x 0.31 inch x 0.24 inch (L*W*T)Total Length: 30mm/1.2 inch It is used for T-slot aluminum extrusions to connect other partsWeight: 64gPackage Content: five x T Slot BoltNote: Light taking pictures and diversified reveals could cause the color of the article in the photograph a bit of varied from the real thing. The size allowed error is +/- 1-3cm.