It can protect the bearings against dust and water. big cap on the outside that will be with a O ring seal inside to protect the bearing on same side. Per set includes a pair of nut cap and a threaded axle. TO buy the part on our eBay shop The price of our eBay is higher than here because it charges us more than 13% fee. The price just includes PayPal fee, buyer pays VAT and customs tax. |