This hollow square tube sleeve is designed to enhance the functionality and durability of exercises machines. Its sleek and sturdy construction makes sure a secure fit within square tubing, providing smooth sliding and reducing wear. Ideal for repair, replacement, or maintenance, it helps extend the lifespan of workout machines and accessories. Features -Color:Black -Material:PP, PA -Size:6.00X4.80X4.80cm/2.36X1.89X1.89in -Note: 50mm-40mm; thickness: 1.5mm-2.1mm -Enhanced stability tube sleeve: the hollow design enhances structural stability, effectively increasing the load-bearing capacity of fitness apparatus -Smooth operation tube sleeve: precision manufacturing makes sure smooth sliding, reducing friction and noise during workouts, enhancing the exercise experience -Versatile compatibility: the conversion square tube is flexibly applicable to different brands and models of fitness apparatus - material tube sleeve: wear-resistant material extends the service life, reducing maintenance frequency, suitable for high-intensity training environments -Secure connection: increases the tightness of pipe connections, preventing loosening, ensuring stability and comfort during workouts Package list: 4 x square tube hollow sleeve bushings