DescriptionMade of high-strength and wear-resistant zinc alloy and plastic material, durable for use, not easy to deform or break.Our threaded stem caster will not easily scratch your floor.Give your walker a smooth rolling experience, bring you more conveniences and comforts. These casters are a great replacement for baby walker casters.Features-Color:As shown -Material:Zinc alloy, plastic -Size:6.50X4.30X4.00cm/2.55X1.69X1.57in -Screw thread interface:M-8 -Made of strong and durable zinc alloy and plastic material, it is safe and gentle and will serve you for a long time.-Excellent production technology makes it flexible and smooth, and can well meet your needs. -The unique design enhances weight distribution and smooth operation, ease to glide and swivel -Reasonable design makes it perform well and helps to provide a smooth rolling action. -The threaded stem casters have a wide range of applications and are suitable for most baby walker, trolley.