D4.05109.935 KW DTBRK7 SS SEAL is a heavy-duty stainless steel caster in the Colson Defender lineup. Featuring a 3-year warranty and highly polished 304 stainless steel construction, the D4 Defender Series is the ideal 2” wide caster solution for customers requiring lasting performance and corrosion resistance. Manufactured from Type 304 stainless steel, this series provides critical defense to applications exposed to washdowns, cleaning agents, steam, caustic solutions, and other environmental conditions that eventually cause oxidation and failure in standard casters.