Inner Tube 4.00-6 Size:4.00-6 Metal rim Ideal for wheelbarrow Factory-Best Price Wheelbarrow Inner Tube 4.00-6 • Rim: Metal or Plastic • Pattern: Rib,Lug,Diamond,Flag, ... , 12"x3.50-6, 12"x5.00-68)13inch: 13"x3.00-8, 13"x3.25-8, 13"x4.00-6, 13"x3.50-6 ... "x5.00-6,15"x6.00-611)16inch:16"x4.00-8,16"x4.50-8, 16"x6.50-8, 16"x4.80-8, 16"x7.50-8,12 ...