Standard Dimension: Heavy duty construction roller housing reqiures a minimum 4-5/8" long x 11/16" wide x 1-3/16" deep slotted bore and 5-3/4" mounting screw hole spacing at bottom of your door panels.Package Includes: Includes 2 pack of sliding glass door rollers, we recommend replacing both rollers at the same time. Screws NOT included, because different type of doors may have different type of screws, single wrong one could just ruin your glass doors!Old Rollers Replacement: If your sliding patio door start getting stuck or hard to silde open, maybe it's time to replace with our brand new sliding door rollers. These wheels are compatible with common wood, extruded aluminum or vinyl framed sliding glass doors manufactured by Jeld Wen, Truth 31761A & Truth 30410, Milgard, Marvin, Malta, Peachtree, Weathershield, Pozzi, Hurd, Lincoln, Caradco, Eagle, K&K - Kolbe & Kolbe, Andersen and others.Sturdy and Overall Construction: Made with heavy duty construction, our sliding door hardware is designed to last for years to come, saving you time and money on repairs. Premium tandem steel ball bearing wheels still work smoothly and noiselessly after a 100,000 cycle test with 265lbs load bearing.Side Adjustment: This common tandem roller features a 1 1/4" steel concave ball bearing wheel and a side adjuster that is accessed through the face of the sliding door panel. Easy adjustable with a flat or cross head screwdriver.