Black Diamond Rubber Tech Tips (2 pack) Ideal for hard surfaces or rocky trails, the quiet, non-marking Black Diamond Rubber Tech Tips avoid rock and trail scarring, and offer excellent grip and durability. Works as replacement tip for Black Diamond Spring 2012 and later only trekking poles and all model Z-poles. Does not work with First Strike, Trail Back, Syncline poles. Sold in pairs. Tech Tip - Rubber Features Quiet, non-scarring Rubber Tech Tips won&';t damage trails or rock and feature excellent grip and durability.