Low profile design allows your trailer to be used for multiple purposes without causing interference(hauling ATVs, furniture, or whatever you may need to haul)HDPE plastic greatly reduces the friction between ski and trailer, making loading & unloading effortlessLowPro Glides (6″ wide) accommodate all Polaris and Woody??s dual runner wear bars Eliminates damage to trailer decking caused by carbide wear rodsLowPro Glides accommodate snowmobiles with up to 8.5″ of ski stance variance Extension kits are available to complete 12-foot trailers, ramps, etc. (4-30″ pieces per kit)Guaranteed not to break, crack, chip or wear outEach 5 foot section sold separately requires one screw pack. No : 200975List of part numbers that are compatible with the number :Barcode :9999999998Supplier number :CR0121catalog number :200973