Prevenz Antimicrobial tread material. Maxim?? Glass-filled Nylon Wheels - NG. Albion???s Maxim?? wheel delivers a maximum performance, economical solution for your most demanding caster applications. With a focus on ergonomics, this advanced wheel starts rolling, keeps rolling and swivels with ease! The innovative nylon and fiberglass construction stands up to solvents, extreme temperatures and high load capacities. Maxim wheels won???t absorb moisture! Wheel face: Slight crown. Finish: Black. Temperature Range: -40?? to +250??F. Hardness: 85 Shore D ??5.