Item no.: SEI-BUK20-01BK-2H (Ref. SEI-BUK20-01BK) Lug width: 20mm Overall Length: 28mm Net Weight (gram): 17gram Finish: Black Anodized on lid Material: 316L Stainless Steel Adjustment hole: 2 mirco adjustment holes to enhance bands flexiability Maximum thickness to fit on Stainless Steel Band: Max to fit 4mm thickness band