Middle Atlantic Caster Base For GRK 42DPThe Middle Atlantic Caster Base for the GRK 42DP delivers a proactive blend of mobility, protection, and professional styling for 42" deep GRK racks. Designed to pair with the GRK family, this skirted wheelbase creates a clean, integrated look while preserving full access to essential equipment. Its the smart upgrade for AV technicians, IT professionals, and media setups that demand easy relocation without compromising stability or cable management.