• Elliptic and round sizes to choose form
• SS316 main body
• SS316 opening frame secures the 10 mm thick lens
• Adjustable SS316 friction hinges and locking handles
• Hull thickness 4-20 mm, no need for plastic inner frames
• Lens clear of obstructions inside and out for 100% clear view
• Easy to install with sealant or closed cell tapes
• Neoprene sealing gasket
• Opening and fixed models