Supports ESD S20.20 and EN 61340-5-1 ESD control programme compliance, conforms to EN100 015//1. L-Shaped PCB Racks. Conductive material allows the racks to be grounded when placed on a grounded surface Designed for safe storage of PCBs 2 sizes available (273 x 210 x 83mm ; 356 x 265 x 127mm), each with 25 slots. Small has 2.4mm and large has 3.2mm between slots Easy to carry Stackable