Sea-Dog Sea Dog 90 deg Stainless Steel Rectangular Base 1" 1in. Designed for use with 7/8" or 1" OD stainless tubing with a wall thickness of .049". Includes set screws where appropriate. Installs with four #10 or 1/4 FH fasteners (not included). Features of Sea-Dog Sea Dog 90 deg Stainless Steel Rectangular Base 1" Investment Cast 316 Stainless Steel 90 Rectangular Base Tube O.D: 1" Installs with four #10 or 1/4 FH fasteners (not included) Package Contents: Sea-Dog Sea Dog 90 deg Stainless Steel Rectangular Base 1" Sea-Dog 281901-1: Sea Dog 90 deg Stainless Steel Rectangular Base 1" 1in