SEIKO OEM Diver's Fat Spring Bars 6 Piece Non-Magnetic Stainless Steel 20mm x 2.5mm x 1.1mm SEIKO Diver's Series Stainless Steel Fat Spring Bar (Non-Fringe Style) 2.5mm Gauge/Diameter - 20mm x 2.5mm x 1.1mm Fits 20mm lugs (1.1 mm pin diameter) OEM Swiss 316L Non-Magnetic Stainless Steel You Get 6 pieces SEIKO OEM Diver's Series Fat Spring Bar