Brass Olives. if the tube O.D is 6mm Use 6mm Olive. if Tube O.D is 1/4 used 1/4 Olive.
Metric Brass Compression Union — COPPERTUBINGSALES
Hosetails, Adaptors & Compression Fittings PARKAIR Brass Compression Fittings
COMPRESSION 15MM COPPER to 1/2 BSP Brass Female Iron Thread Connector Adapter £4.23 - PicClick UK
ENOTS BIRMINGHAM ENGLAND AC1229 valve,pneumatics,original part,NEW OLD STOCK £29.45 - PicClick UK
Compression 54mm Olive Copper, Compression Olives Copper, Brass Olive Barrel Plumbing Olives Compression Copper Pipe Gas Olb, Copper Olives Pack, Compression Ring Olives, Compression Copper Olives Pack
BRASS BARREL & Stepped Olives, Metric or Imperial Tubing Nylon Pipe Compression £1.94 - PicClick UK
BRASS OLIVE BARREL Plumbing Olives Compression Quality Copper Pipe Gas Water Air £5.20 - PicClick UK
10X TUBING NUTS to suit Enots Compression Fittings 4mm-12mm like Norgren Fitting £3.49 - PicClick UK
6mm OD Metric Brass Compression Sleeves — COPPERTUBINGSALES