Wheaton Snap On Rubber Stoppers
Wheaton Snap-On Rubber Stoppers. The snap-on design of these rubber stoppers provides maximum sealing for laboratory vials and bottles with a blow-back glass finish, which is a small ridge in the interior of the vial's neck. Ideal for serum bottles and serum vials. The snap-on rubber stopper locks into the blow-back ridge, providing a tight seal and keeping the stopper from backing out. The snap on rubber stopper style is not recommended for vials with a straight-walled finish. The blow-back feature is typically found in vials from North American manufacturers. Available in both natural (red) latex rubber as well as butyl (grey) rubber to suit your specific application.