Pelican Replacement O-Ring for 1730 Transport Case 1730. Simply remove the ruptured O-ring and slip the Pelican replacement O-ring into place. The ring forms a seal which keeps your 1730 Transport Case watertight making the Pelican 1730 Transport Case Replacement O Ring an essential dry box accessory for those who need their case to stay absolutely dry. You can't afford to have your valuables ruined by water damage so order your 1730 Transport Case Replacement O-Ring by Pelican today. Specifications for Pelican Replacement ORing for 1730 Transport Case: Compatible with: 1730 Transport Case Seal: Watertight Color: Black Features of Pelican Replacement 1733 O-Ring for 1730 Transport Case: Replaces O-ring on 1730 Transport Case Creates watertight seal Easy replacement Essential if O-ring on transport case is damaged Package Contents: Replacement O Ring for 1730 Transport Case by Pelican Pelican 1733 Replacement O-Ring for 1730 Transport Case 1730 1733-321-000