Schioppa's Color Gel Series offers six beautiful transparent polyurethane (urethane) color wheels to give your table, furniture, or special project that extra pizazz it was lacking. Boasting an impressive cost to benefit ratio, they have been the go to wheel for designers, manufactures and at home do-it-yourselfers. The Gel Series have an acrylic center and are wrapped with a thick polyurethane thread made from recycled materials. Offering exceptionally easy rolling ability and a strong resistance to deformation on static loads. Schioppa's Color Gel Series are the go to wheel for all around floor protection with just a little added something.