THIS one even says PVC. PVC burns and drips and can burn your hose down and is impossible to extinguish if oxygen fed. EVEN UNDER WATER!
https://www.ebay.co.uk/itm/193212499858This one doesent say at all. But its like what I had. It is plastic that feels rubbery. So easy to think its safe silicone.
https://www.ebay.co.uk/itm/174813867378This one is intrinsically safe as silicone may char and go white at ultra high temperatures, Like when fed with oxygen but it does not burn or drip fire everywhere! You cannot light it, it doesent support combustion. So the problem could never have happened. This should be required by law and I thought it was!
https://www.ebay.co.uk/itm/313578006846Be careful what you buy. The wrong one can burn you and your house down and you cannot stop it even if dunked in water. I tried that.