1.5-inch fixed(1.5寸固定) 1.5-inch flat bottom activity(1.5寸平底活动) 1.5-inch flat bottom edge brake(1.5寸平底边刹) 1.5-inch screw rod activity(1.5寸丝杆活动) 1.5-inch screw rod side brake(1.5寸丝杆边刹) 2-inch fixed(2寸固定) 2-inch flat bottom activity(2寸平底活动) 2-inch flat bottom edge brake(2寸平底边刹) 2-inch screw rod activity(2寸丝杆活动) 2-inch screw rod side brake(2寸丝杆边刹) 2.5-inch fixed(2.5寸固定) 2.5-inch flat bottom activity(2.5寸平底活动) 2.5-inch flat bottom edge brake(2.5寸平底边刹) 2.5-inch screw rod activity(2.5寸丝杆活动) 2.5-inch screw rod side brake(2.5寸丝杆边刹) 3-inch fixed(3寸固定) 3-inch flat bottom activity(3寸平底活动) 3-inch flat bottom edge brake(3寸平底边刹) 3-inch screw rod activity(3寸丝杆活动) 3-inch screw rod side brake(3寸丝杆边刹) 4-inch fixed(4寸固定) 4-inch flat bottom activity(4寸平底活动) 4-inch flat bottom edge brake(4寸平底边刹) 4-inch screw rod activity(4寸丝杆活动) 4-inch screw rod side brake(4寸丝杆边刹) single wheel(单轮)

black rubber(黑色橡胶)