1. Made of stainless steel 316 or brass and rubber 2. Strong corrosion resistant construction 3. Easy to use cam style tight, long-lasting seal 4. Fully adjustable torsion, will not leak or loosen under vibration 5. Commonly used for boat bilges, transoms, seawalls, bait wells, live well hulls 6. Suitable for 19mm/25mm/32mm hole spacing 7. Weight: about 40 grams
