Help with size of copper tubing and compression fitting

61CL-10 Dixon Valve Brass Compression Fitting - Long Nut - 5/8 Tube S — HoseWarehouse

How to Install a COMPRESSION Fitting (PROPER WAY) : 8 Steps (with Pictures) - Instructables

How to Use Compression Fittings With Copper Pipe

Compression 4mm Tube OD x 1/8 NPT Male Pipe Brass Fitting

3/8 OD Compression Copper Tube Union Straight Joiner Fitting Air Gas Water

Size: 3/4 Tube OD x 3/4 Tube OD Compression Union

Brass Compression Tube Fitting, Union, 3/4 OD x 3/4 OD LIFE TIME WARRANTY (3)

Putting my first loop together Are compression fittings THIS hard to put onto soft tubing?, Page 2

A Guide To Pipe Fittings and How To Use Them

Putting my first loop together Are compression fittings THIS hard to put onto soft tubing?

Poly Compression Fittings

Copper tubing - Wikipedia

Does your Norprene tubing do this to copper blocks?

Everbilt 1/4 in. Compression Brass Nut Fitting 800629 - The Home Depot

169C-0502 Dixon Valve Brass Compression Fitting - Male Elbow - 5/16 T — HoseWarehouse