3/8" USA Style Compression Sleeve for GRO40-L2, GRO40-L3, & GRO40-L9 brooders (part #30 in diagram 1), as well as GRO40-CR-N5 & GRO40-CR-L5 brooders (part #27 in diagram 2).
3/8" USA Style Compression Nut for GRO40-L2, GRO40-L3, & GRO40-L9 brooders (part #31 in diagram 1), as well as GRO40-CR-N5 & GRO40-CR-L5 brooders (part #28 in diagram 2).