Dear Sir/Madam, This is Keith Raney from US. I'm looking for products with the following specifications: Looking for a lockable compression / traction gas spring. At this stage we only need QTY (1) sample for testing. If it works then min qty 100. We are also looking into a source for hydraulic release. Specs 200mm stroke. 600N force. Rigid in both directions. Outdoor use. Will be used in commercial environment. Coke, Pepsi, Budweiser, etc. We plan on adding spring assist to our Power Ramp. See website /Products.html See picture for perfect example. Show More