Super-O Boyer watch bracelet is composed by 3 flat and solid 316L stainless steel units and a curved solid end piece perfectly fit Seiko SNZF17 Sea Urchin. Screw-in adjustable details instead of pressure pins. This item includes one pair of FAT spring bar (eg. generic Seiko Dia. 2.5mm spring bar) to ensure a more secure connection. Tapered 22mm lug into 20mm buckle size. Accompanied with brand new design solid 316L stainless steel SUB diver watch clasp, made from solid 316L stainless steel with extra 6 micro holes for flexible fine tune length adjustment. SUB diver watch clasp is ideal for watch band with thickness approximate 4.0 - 5.0mm. This Super-O Boyer watch bracelet is a good choice of Seiko replacement watch band for your SNZF17 Sea Urchin models.