All have chamfered link plates for optimum shifting performance with Shimano, SRAM, and newer Campagnolo 10-speed systems. ConneX-10s1: weight saving hollow pins and stainless steel inner link plates, 260g. ConneX-10sX: stainless inner plates with nickel coated outer plates, 275g. ConneX-10s8: nickel plated inner/outer link plates, 275g (save almost 15% on the most popular 10sp model with a 25M bulk roll = 18 chains). Connex-10s0: corrosion-resistant steel link plates, 275g . Includes conneX 10-speed spring-clip connector.