Keep your rolling chairs in top condition with our swivel caster sleeves. These sleeves are designed to fit over the stems of your chair casters, providing a secure and stable connection. suitable for office chairs, they help maintain smooth swiveling action while protecting stems from wear and tear. Easy to install, they are a must-have accessory for any office setup. Features -Color:Black -Material:Plastic -Size:3.30X1.50X1.50cm/1.30X0.59X0.59in -Inner diameter: 8mm -Outer diameter: 16mm -Fit for 8*38 rods -Smooth movement: the stool swivel caster wheels protective cover ensures smooth and effortless movement, enhancing the functionality of your office chair -Secure attachment: socket insert provides a secure attachment for your chair wheels, preventing them from detaching during use -Floor safety: the chair glides protective case helps to protect your floors from scratches and damage, ensuring they remain in excellent condition -Versatile compatibility: these furniture insert sockets are compatible with a wide range of office chairs and stools, making them a versatile addition to your furniture accessories -Ample supply: the set of swivel caster sleeves provides you with enough covers to upgrade or replace the wheels on multiple chairs Package list: 20 x Stool Swivel Caster Covers