1. TR - 4 Motor Cycle Tube Valve Stems Without Rubber Base. 2. TR - 6 Motor Cycle Tube Valve Stems Without Rubber Base. 3. TR - 13/14/15 Motor Car Tube Valve Stems Without Rubber Base. 4. TR - 218 Tractor Tube Valve Stems Without Rubber Base. 5. TR - 412/3/4/5/8/23/25 Tubeless Valve Series Without Rubber Base. 6. V1.06.1 Moped Tube Valve Stems Without Rubber Base.