Product Name: 4.00-8 Air Wheel With Plastic Rim Model NO.: 4.00-8 Surface Treatment: N Bearing Type: Roller Bearing Brake: Without Brake Wheel Material: Rubber Type: Fixed Wheel Material: Rubber Application: Trolley Trademark: KOVO Transport Package: in Bulk Origin: Qingdao Product Description 4.00-8 Pneumatic Wheel with plastic rimSquare inner 25mm;Round inner: 20mm;Wheels for wheelbarrow, hand truck and hand trolley.Air wheel: 6"*2"/2.50-4/3.00-4/3.50-4/3.50-8/4.00-8/4.50-8/6.50-8;Solid wheel: 6"*2"/8"*1.75"/8"*2"/10"*2.5"/13"*3"/14"*4";PU foam wheel: 3.50-4/3.50-8/4.00-8/6.50-8;Our advantage:1. Well communication before placing order to avoid any misunderstanding. 2. Production plan is arranged from Sales department to Product department via paper. 3. New sample assembled before every bulk production to make sure the products could be well assembled.4. Quality control moulds during production to maintain the quality for each parts.5. Assembled sample test for all finished parts to make sure the products are good. 6. Well package based on request. 7. We are keeping improving our services of the whole process.8. We could make quick improvement on the products based on the market. 9. We could do COC, CIQ files to some special markets.We focus on high quality service for you.KOVO WHEELSize:16"*4.00-8 air wheelRim:PlasticHole:Square inner:25mm/Round inner:20mmPacking:In bulk;Loading:2400PCS/20';