I am looking for wheels, here are the specifications bellow: Quantity: 300/year 1 rim 2.5x8 (1) Plastic 2 ball bearing 6204-2z (Inner diameter 20mm) Steel 1 rim spacer SS304L 1 Tire 21x12.00-8 (2) Nylon 1 Inner tube 21.00x12-8 (3) Butyl In the case of you can supply, please send me your best quotation.