x500id*1 Colour brhtness (colour lht output) and white brhtness (white lht output) will vary depending on usage conditions. Colour lht output measured in accordance with IDMS 15:4;DOM ( DRAWN OVER MANDREL ) MILD STEEL TUBING 1.00 OD X .500 ID ( .250 WALL ) 24 LONG (OTHER LENGTHS CAN BE POSTED ON REQUEST) STORED INSIDE WAREHOUSE