Copper Tube Type K, High PSI 1/2" OD x .402" ID x .049" Wall x 5 Ft Length
OD:  1/2"
ID:  .402"
Wall Thickness:  .049"
Length in Feet:  5
Max. PSI @ 100F:  1900
Industry Tube Designation:  3/8"

OD Tolerance is +/-.002"
Seamless,  Hard Temper
ASTM B88
Shipped as a straight length.  They are not bendable

Tube industry designation is not actual dimension.