NOTE: If you are unsure of compatibility of this item with your watch or product, ask us first. We are genuinely happy to help. Returns are subject to 10% restocking fee and must be in new, unused condition and in original packaging to be eligible for return. Custom built items are generally not eligible for returns.These JaysAndKays® Metal Adapters are to adapt your Casio F-91W to use most standard 20mm 1-piece or 2-piece straps or bracelets. If your model is not listed, contact us first to check compatibility.The kit includes option of either Adapters Kit Only or Adapters Kit + Strap. WATCH AND OTHER ITEMS DISPLAYED ARE FOR DEMONSTRATION ONLY AND ARE NOT INCLUDED. Adapters Kit Only includes the following items: - (2) JaysAndKays® Metal Adapters for F91, BLACK- (1) budget springbar tool- (2) 20mm stainless steel springbars Adapters Kit + Strap includes items mentioned above plus a chosen strap with specs as follows... Nylon Strap Specs:Thickness: ~ 1.2mmLengths: ~ 78mm/128mm (not incl. buckle)Hardware: Stainless Steel in either Black PVD or Polished finish Leather Strap Specs:Thickness: ~ 1.5mm Lengths: ~ 75mm/140mm (not incl. buckle)Hardware: Stainless Steel in either Black PVD or Natural finish WATCH AND OTHER ITEMS DISPLAYED ARE FOR DEMONSTRATION ONLY AND ARE NOT INCLUDED.If you wish to pair this purchase with any of our other 20mm straps or bracelets, have a look in our store for other options.SHIPPING:We WILL ship to APO/FPO. We here at JaysAndKays are veterans too and we Thank You! for your service.We WILL combine shipping and refund redundant shipping charges. A $2 handling fee per order will be applied for separate orders which are requested to be combined.We WILL ship internationally. Buyer is responsible for any customs fees or duties. Thanks for Looking!