I've now got two full size versions of these for sale.
Machined from billet and designed to protect down to 150M
They have an internal height of 155mm when screwed together.
The bottom half is 100mm deep with an ID of 78mm.
The top half has a restriction of 72mm where it seals to the bottom.
Great for phone, Fags etc, but are actually a serious piece of kit designed for commercial divers.
They retail at about £115ea
Does anyone want to make an offer before I ebay them?