PU-Foam Wheel Model: 4.00-8 Good design of patterns;All kinds of bearings,rims and ... Dia.(mm)Width(mm)Hub length(mm)Hole Dia.(mm) 16"x4.00-83909014016/18/20/25/35/36/... 1,Good ... ,Bearings and bushes with many sizes like 1/2",5/8",3/4",1" and other sizes;4, Angled grease fitting ... fitting;5,Top quality;6,Competitive price;7,Good service. 16"x4.00-8 PU Foam Wheel