139-GRY is a type of molded block (LMB) from Heeger. It is used in consumer or industrial-grade applications to provide a housing for electronic components or mechanical assemblies. The GRY block is made from polycarbonate, making it both impact and fire resistant. It is available in sizes from 8-37 pins, allowing for a variety of configurations. The GRY block offers superior protection against dust, corrosion, and other contaminants that could harm components. The product is UL recognized, RoHS compliant, and ISO 9001 certified.