Having more microfiber strands weighing 115 grams per refill against ordinary refills weighing approximately 75 to 100 grams Extra wide Dia 34cm Microfibre refill making it cover more area compared to ordinary refill of diameter 28 to 30 cm. The middle Disc part is made of pure virgin plastic hence making it more durable against the cheap refills which have a black core made of recycled low quality plastic Mop Head freely spins 360 degree 8,000 strands of banded microfibre reusable and machine washable Color: White / Black Ring, White Bristles, Material: Polyester Microfiber, Mop Head Disc