The ABS-WK from ABS Technics is a Microwave Absorber with Thickness 0.51 to 0.98 Inch / 13 to 25 mm, Thickness 0.51 to 0.98 Inch, Thickness (mm) 13 to 25 mm, Operating Temperature 110 Degree C. Tags: Lossy Foam Absorber. More details for ABS-WK can be seen below.