Quick view Starboard Mast Plug These mast plugs are cnc cut from 1" white starboard plastic. They are sized to be a snug fit in the aluminum tube with a 1/4" radiused edge and 1/4" of plastic "capping" the end of the tube. Refer to the size chart above to be sure you get the... MSRP: Now: $8.00 Choose Options Quick view B&B Yacht Designs Starboard Mast Plug MSRP: Now: $8.00 Choose Options Compare Selected × OK