Replaces / ATCO RB6107 / 35R6107. ALL FITTINGS FIT BARRIER TYPE HOSE AND ARE BEADLOCK STYLE, REQUIRING AN A/C HOSE CRIMPING TOOL. Excellent QualityAir Conditioning, Straight Ho se Splice, #10 REDUCED (1/2" I.D / 49/64" O.D.) Barrier Hose To #12 (5/8" I.D / 15/16" O.D.) REDUCED.