West System® Fillable Caulking Tubes. Great for injecting large amounts of West System® Epoxy, laying a lengthy bead of epoxy, making fillets, injecting epoxy into holes or repairing cracks in concrete. Designed for use with a standard caulking gun. Can be refilled several times before epoxy begins to cure. Tubes can be refilled again after cured epoxy is popped out. Holds approximately 10 fl. oz. 2 pack.