15pcs Hobbypark Plated Landing Gear Wheel Stopper Set Collar 7x2.6mm / 0.27"x 0.10" RC Airplane Plane Replacement Parts Outer Diameter : 7mm / 0.27" Inner Diameter:2.6mm /0.10" Thickness:4mm / 0.16" Net Weight:0.9 g/pc Package Include:15 Pieces Plated Wheel Collar & Screws + 1 Piece hex wrench