Suunto D4i Strap Kit $36.00 Suunto D4i Strap Kit This aftermarket (not original) Suunto D4i kit includes the strap, screwdrivers, screws, and nuts to attach the strap. The strap fits all Suunto D4, D4i, and D4i Novo variants. The straps are made of durable silicone material that will stay clean and nice for a long time. These silicone straps are easy to put in place by yourself.