Note the dimensions: housing height 1.89" housing width 1.17", housing length 2.8", roller diameter 1.57", pulley width 0.32". Sliding glass door rollers have steel ball bearings to avoid jamming.
High-quality materials: The shell is made of high-quality stainless steel, and the ball is made of high-quality steel material. Sliding door rollers factory after 100,000 times pressure sliding test can still work, long-lasting.