Kantech P20DYE ioProx XSF/26 bit Proximity Card (100 pack) Card dimensions cm 8.57 x 5.4 x 0.079, in 3.375 x 2.125 x 0.031 Thin, flexible polyvinyl chloride laminate, glossy white on both sides Operating temperature -45C to 70C (-50F to 160F) Weight 6.80 g (0.24 oz)