Air Control Retro-Fit Adapter, Compatible Grainger Part Number 1JZL6, 1JZL7, 2EVZ8, 2EVZ9, 2EWA1, 38C414, 38C415, 49T910, 49T912, Compatible Mfr. Model Number 1652-1-BP-04-M, 1657-1-BP-04-M, 2566-050-001, 2566-051-001, 2566-052-001, 3373, 3373-8IN, 3374, 3374-8IN, For Use With Acorn Air-trol Valves, Acorn Lavatories, BestCare Faucets, For Use with Series Acorn Air-trol Valves, Acorn Lavatories, BestCare Faucets, Noryl, Acorn Wash-Ware(R), Size 1 3/4 in W x 2 3/4 in H x 1 3/4 in D