bio balls and check valves for diy c02 Shipping MI

[milesalive]

50 Bio balls 10$ shipped
500 bio balls 35$ shipped

Check Valves:

3.00 each (0-5) shipped
1.50 each (5-20) shipped
1.00 each (21-?)shipped

http://imagesl.fotop.net/albums2/aas/Cave/Check_Valve_x_5.jpg

[coach_z]

what makes these special or different from a standard check valve to be classified as for 'diy co2'?

[milesalive]

nothing special im just tellling a use for them

[jbbiggs]

what size are the balls? what size container would the 500 fit in?