Red Hound Auto 4 Stainless Steel 316 6mm Square Eye Plates 1/4" Marine SS Pad Boat Rigging 4 Square Eye Plate Base: 40mm x 35mm. Center-to-Center: 26mm x 21mm. Height: 26mm. Thickness/Diameter: 6mm. Perfect for sailing, boating, and many other marine and rough weather applications. 316 STAINLESS STEEL - FINEST MARINE GRADE STEEL AVAILABLE! Heavy duty and Weather-resistant, product can withstand harsh weather conditions