Safe-T-Alert Heavy Duty Trailer Dock/Jack Stand Pad [SA-6200] Cartography | Furuno Lock feature prevents potential backflow

Lock feature prevents potential backflow and possible flooding

Width: 4 7/8 Inches 124 mm

With input from a SI-TEX Metadata AIS module (or other AIS receiver)

and quickly locks in place with a 1/8 twist

and the A-Series has been there

Safe-T-Alert Heavy Duty Trailer Dock/Jack Stand Pad [SA-6200] Cartography | Furuno Lock feature prevents potential backflowHeavy Duty Trailer Dock Jack Stand Pad Features: For use with trailer pad or wheel jack stand Handles trailers for boats, snowmobiles, motorcycles, personal water craft, towables, RV Campers Use on variety of surfaces Works on concrete, asphalt, sand, rock, dirt, grass even muddy locations Lifetime warranty from cracking or breaking Tough enough to drive over guaranteed not to crush, crack, or break down Use Trailer Dock anywhere Can be used at camp