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Nu Hope Laboratories Inc
Round barrier discs with 3 1/2" outside diameter.1" opening
Nu Hope Laboratories Inc
Standard barrier discs: 1 7/8" i.D.-3 1/2" od.
Nu Hope Laboratories Inc
Round barrier discs with 4" outside diameter.1 1/4" opening
Nu Hope Laboratories Inc
Oval barrier discs, oval 2-1/4" x 3 1/2" o.D with 1/2" starter hole.
Nu Hope Laboratories Inc
Barrier #54 oval disc 1-1/8" x 2" i.D.2-1/4" x 3-1/2" od.