Ball bearing slide , drawer slide , full extension ball bearing slide Code:4500 Material:Cold rolled steel, Thickness:1.2x1.2x1.2mm/1.2x1.2x1.5mm/1.0X1.0X1.2/1.0x1.0x1.0mm Width:45mm Length:10"-24" Finish:Zinc plated Load Rating:100BLS Features : There are two stronger lines in the inner and outer rail respectively , which can effectively enhance the anti-distortion power in order to get more smoother and steadier when move