PBC Linear RR18 048.000 Linear Guide Rail, Redi Rail, Size 18, 48 in Length, 1.921 in Width, Aluminum Alloy TK 110INS EN60903 Includes Pair of Electrical EN60903 Includes Pair of Electrical Insulating Gloves AC Max Clamp Type Strap Framing Type Strut Channel Strut Channel Framing Component Routing Clamp Material Zinc Plated Steel Cushion Material TPE For Pipe Size (Inch) 3 1 2" For Pipe Size (Metric) 89 mm For Pipe Size 3 For Channel Width 1 5 8" Length 3 15 16" Width 1 1 4" Height 5 9 16" Center Height 2" Thickness 1 8" Weight Capacity 3 Rail Material Aluminum Alloy Radial Rail Type Slide Series RR System of Measurement Inch Country of Origin United States