The top bellow including Jubilee clips for DP Sterndrives including 280, 290, DP-A, DP-D and DP-E outdrives. These kits include the Jubilee clips. Exhaust bellows should be inspected regularly and changed every 1-2 years.
This is a drain plug O-ring for the 290-DP, DP-E other DP drives listed below. This is the larger option for an MS25S and some 120S-E Saildrives whereas the other option, part number 3855081 is a much smaller O-ring measuring about 6-7mm.