Speidel Twist-O-Flex watch bands are active sellers at The Watch Prince. And, one of the more popular expansion watch bands is the black Romunda. Romunda Expansion Watch Band features: Black expansion links (band stretches to fit over your hand) Silver-tone edges Straight, adjustable end pieces Fits watches with 16mm, 17mm, 18mm, or 19mm lug widths (see size chart) Speidel model 1076/02