smooth and noiseless; durable in use; reasonable in price cycling test: 50,000 times, SGS test Features : 32mm system hole, Full extension ball bearing drawer slide 1Width : 27MM 2Cycling test:50,000times 3Smooth and noiseless 4Reasonable in pr Material: Hardened rolled steelSlide length: 250mm-900mmThickness: 1)1.0*1.0mm 2)1.2*1.2mmFinished :zinc plated/blackSlides can pass 50000cycles test, ...