All rubber stoppers are Pure White Gum Laboratory stoppers. The drilled stoppers have a 3/8" drilled center hole for use with an airlock; the solid stoppers have no hole.
$0.99
$0.89
$0.99
$1.99
$3.49
$3.79
$4.39
$2.75
$4.39
$2.39
$2.19
$2.59
$2.89
$1.99
$1.99
$1.69
$1.99
$1.69
$1.99
$1.69
$1.99
$1.25
$1.25
$1.25
$0.99
$0.89
$0.89
$0.89
$0.79
$0.79
$0.79
$0.79
$0.79
$0.79
$0.79