Shock Absorber Retainer Dadp-Dgc-18-Gf for Dgc and Dgci Linear Drives. Size=18, Corrosion Resistance Classification Crc=2 - Moderate Corrosion Stress, Ambient Temperature=-10 - 80 ┬░C, Product Weight=140 G, Materials Note= (* Free of Copper and Ptfe, * Conforms to Rohs)