MaxxMacro 54 Flat Electrode Holder 3R Pallet Spacer MaxxMacro 54 Spacer 54MM predrilled for mounting on MaxxMacro 54 3R pallets. 100% cross-compatible with System 3R Macro 3R-658.1E-S, Spacer plate, 54×54 mm Includes proper chip pocket for automated robotic loading Ground Top and Bottom MaxxMacro 54 Spacer 54MM predrilled, Precision Ground Material: 420C Stainless Block Machined and Hardened (spacer) Size: 54*54