The Shark NZ801UKT 40 back wheels are a replacement part for a Shark upright vacuum cleaner, specifically model NZ801UKT 40. These wheels are designed to ensure smooth and efficient movement of the vacuum while cleaning carpets. Made by Shark, a trusted brand in home cleaning appliances, these back wheels provide stability and manoeuvrability for easy cleaning in any room of the house. Ideal for those looking to replace worn-out or damaged wheels on their Shark vacuum, these back wheels help maintain the overall performance of the appliance.