These are the Hot Racing Aluminum Cross Drilled Slipper Pad 32.8x15.2x1mm from AxialFEATURESAluminum constructionBetter heat displacement improved surface area for a more positiveengagement. INCLUDESTwo 32.8 x 15.2 x 1mm Aluminum Slipper PadsSPECIFICATIONSInner diameter: 0.60" (15.2mm)Hex Size: 1.3" (32.8mm)Thickness: 0.039" (1mm)CommentWill work on any Axial that use AXIAX31027 Spur Gear 32P 56THot RacingSYET256T Steel Spur Gear 56 Tooth 32 Pitch SYET260T Steel Spur Gear 60 Tooth 32 Pitch SYET264T Steel Spur Gear 64 Tooth 32 Pitch SYET268T Steel Spur Gear 68 Tooth 32 Pitch Compatible with the AX31026 Slipper Plate AXIC1026, and the AX31027Spur Gear AXIC1027