Crafted from plastic, these replacement caster wheels are built to withstand daily use. Their robust construction ensuring longevity, while the smooth-rolling type provides quiet and efficient operation. Ideal for oil-filled radiators, these wheels enhance the mobility of your heater. Features -Color:Black -Material:PP -Size:4.00X3.00X0.80cm/1.57X1.18X0.31in - Thread diameter: 8mm -Versatile: compatible with a wide range of products including electric heaters, furniture, bath seats, and trolleys -Simple setup: quick and easy to install, providing your heater with smooth mobility -Protects floors: designed to be gentle on floors, avoiding any scratches or marks -Replacement: ideal for replacing broken casters, facilitating the movement of your oil heater -Secure fit: requires an iron plate hole of at 8 mm for proper fixation Package list: 4 x casters 4 x screw caps