Replaces ATCO BL1701 35B1701. Excellent QualityAir Conditioning, Bulkhead,STRAIGHT M ale INSERT O Ring Type, #6, Crimp On Hose Fittings For #6 STANDARD ( 5/16" I.D. / 3/4" O.D.) Barrier Hose. ALL FITTINGS FIT STANDARD BARRIER TYPE HOSE AND ARE BEADLOCK STYLE, REQUIRING AN A/C HOSE CRIMPING TOOL.