Material: Slide elements: Cold-rolled steel, bright zinc-plated. Ball retainers: Cold-rolled steel, zinc-plated. Balls: Hardened steel.Telescopic ball bearing slides for applications in the industrial and electronics sector. Sold by pair (1 x product no. = 1 pair of slides).•, Hold-in in the centre position.•, Pulls out to front and back. For applications requiring access from both sides of the drawer.•, Service life 80,000 cycles.•, Temperature range: -20°C to +70°C.Note: Recommended mounts: M4 screw. Max. head. height 2,5mm/Ø9,6mm. Horizontal mounting not recommended. Use all mounting positions to achieve the max. load rating.Over-extension per direction.