Thermoplastic rubber & polyurethane casters are ideal for hotel floors. Both types of casters are floor safe & non-marking which is ideal for keeping your hotel floors looking like new. Thermoplastic rubber provides a softer & quieter ride than polyurethane casters, but holds less capacity per caster. Polyurethanes smooth tread is ideal for carpet as it allows it to pivot easier than thermoplastic rubber which may pull a bit on the carpet.