Simson Valve Adapter Assortment bike and recreation for inflating among others air mattresses, balls and various bicycle valves. Always handy, at home or on holiday! The Simson valve adapter assortment contains 5 pieces valve adapters: 2 x adapters for air mattresses and inflatable toys, 1 x 1 x adapter for a football, 1 x valve adapter Bicycle (Dunlop), and 1 x valve adapter Schrader (car).