Vanquish Products Brass SLW Wheel Hubs Compatible with SLW, OMF,, Method, and SSZ style wheels Made from brass in the USA Sold in pairs Increments of 1/8 of an inch Uses six 4-40 screws to attach hub to wheels Hardware not included US Patent No. 8, 167, 380 B2 Weight By Size SizeWeight (g) 225 Hub 13 350 Hub 20 475 Hub 27 600 Hub 34 725 Hub 41 850 Hub 48