Package includes: 2 pcs Glass Door Limit AntiCollision Rubber Blocks Matching screws (M4 x 16 mm) Plastic caps Size and dimensions: Block size: 60 x 50 x 20 mm (L x W x H) Hole distance: 45 mm Screw size: M4 x 16 mm Material and build: Durable plastic construction Designed for noise reduction, shock absorption, antislip performance, anticollision protection, and scratch prevention Key benefits: Keeps glass sliding doors, shower doors, and sliding tub enclosure doors properly aligned during use Reduces impact noise and vibration for a quieter and smoother operation Protects glass surfaces from chipping, scratching, or undue wear caused by repeated contact Prevents doors from slipping out of track or misaligning over time Ideal applications: Sliding glass shower doors in bathrooms to keep panels aligned and prevent loud impact when closing Glass tub enclosure doors to maintain smooth and quiet opening and closing while protecting the glass edges Residential or commercial glass sliding doors to ensure steady and secure performance, prolonging the lifespan of door hardware Performance highlights: Shockproof design absorbs impact during opening and closing Antiskid feature provides stability and prevents door misalignment Simple installation with included screws and caps for a neat, finished appearance This product offers reliable protection and alignment for glass sliding door systems, reducing noise, preventing damage, and improving overall functionality with minimal maintenance.