DURABLE THICK PLASTIC for safe long-lasting use UNIVERSAL DESIGN to fit most walkers (1" inside diameter leg tubes) COMPARE to MDS86615C walker glide caps COLOR CHOICES - which one is your favorite? Our customers love these economical walker glides because they are extra-thick for longer-lasting durability. Features durable high-density plastic construction. Designed to fit most walkers with 1" tubing (inside diameter). Install in seconds with no tools required. Colorful options make these a great gift choice!