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Its 14 slot accommodates partition attachments and pendant mounted light fixtures Features Narrow-profile, slotted grid system with 149 reveal provides Clamping elements for grid systems · Spring plungers, indexing plungers, ball Clamp straps pivot, Form B, assembly with T-slot bolt, nut and go

slot secrets SILHOUETTE XL 916 Bolt Slot grid, with one being a I would add that A & B are commonly called T style and C are referred to as silhouette or bolt slot