The Middle Atlantic 5WL is a caster accessory that can be bolted to the bottom of all ERK & Slim 5 series rack systems. This set of 4 commercial-grade casters includes 2 locking and 2 non-locking casters, providing ease of mobility and stability in use. The 5wl casters can be bolted directly to the Slim 5 rack or fit within a skirted base. The addition of the 5WL caster accessory to a rack system adds 3-7/8in to the overall cabinet height, providing extra lift and mobility to the rack system. The 1,300 lb. weight capacity of the commercial-grade casters ensures that your equipment stays safe and secure during transport.The Middle Atlantic 5WL is a caster accessory that can be bolted to the bottom of all ERK & Slim 5 series rack systems. This set of 4 commercial-grade casters includes 2 locking and 2 non-locking casters, providing ease of mobility and stability in use. The 5wl casters can be bolted directly to the Slim 5 rack or fit within a skirted base. The addition of the 5WL caster accessory to a rack system adds 3-7/8in to the overall cabinet height, providing extra lift and mobility to the rack system. The 1,300 lb. weight capacity of the commercial-grade casters ensures that your equipment stays safe and secure during transport.