Smaller unit:
• Hole size range: 19-32mm (~3/4" to 1-1/4")
• Flexible dome outside diameter: ~62mm (~2-7/16")
• Length overall, including eyelet: ~270mm (~10-5/8")
• Rod, minor diameter and length: ~7.8mm (~5/16") x ~35mm (~1-3/8")
• Rod, major diameter and length: ~9.7mm (~3/8") x ~210mm (~8.25")
• Eyelet, inside width an length: ~13mm (~1/2") x ~16.5mm (~5/8")
Larger unit:
• Hole size range: 25-52mm (~1" to 2")
• Flexible dome outside diameter: ~95mm (~3-3/4")
• Length overall, including eyelet: ~285mm (~11-3/16")
• Rod diameter and length: ~9.7mm (~3/8") x ~260mm (~10-1/4")
• Eyelet, inside width an length: ~13mm (~1/2") x ~16.5mm (~5/8")
Emergency secondary plug:
• Inside diameter: ~10mm (~3/8")
• Height: ~60mm (~2-3/8")
• Outside diameter, top: ~55mm (2-1/4")
• Outside diameter, bottom: ~19mm (3/4")Seabung

1) Hole size ranges provided as guidance by the manufacturer. Photos show the smaller unit being used on a 3/4" flush seacock with an inside diameter of around 14.5 mm (~9/16").

2) Tried installing in one of the 90 degree seacocks and the plug was not able to make the turn.

3) Do not leave damaged area unattended with plug in place.

These things look a little goofy but they are an effective stop gap measure for a failed through hull or unexpected hull puncture.