【HEAVY DUTY 】These dust caps are made of high quality carbon steel.Provides corrosion and abrasion resistance.Heavy duty tie plates provide adequate strength. 【SURFACE GALVANIZED】The surface of the parts is galvanized, looks very nice.Corrosion-resistant, especially seawater corrosion-resistant, not easy to rust. Long service life. 【DIMENSION】OD: 1.98 inch/ 50.4 mm.Please check the size information and compatibility carefully before placing an order. 【FIT】Fit most standard 2000 -3500 lb trailer wheel hub for both types of axles EZ Lube and standard. Typically used on NON-EZ Lube Hubs.Fit standard brake & idler trailer axles for most 4 lug & 5 lug axles with 1.98 diameter cap. 【SATISFACTION GUARANTEE】For whatever reason, if you are not satisfied, you can request a replacement. Please do not hesitate to contact us if you have any questions. We will show you our sincere attitude and satisfactory solution. Please rest assured purchase. ASIN B0CHRXT5L8 Brand iBroPrat Model QB-QC0034-4 Item Weight 6.4 ounces Manufacturer iBroPrat Item model number QB-QC0034-4 Package Dimensions 6.3 x 4.61 x 1.54 inches Manufacturer Part Number QB-QC0034-4