Getting your rig level at every campsite matters -- for your refrigerator's absorption cooling, your slide-outs, your sleep, and your sanity. The RV Designer E407 is a compact stick-on bubble level that mounts to any clean, flat surface in seconds with no tools and no drilling. Stick it to your dash, your entry doorframe, a cabinet face, or your countertop and you will always know exactly where you stand -- literally.
Every RV owner knows the drill: pull in, guess at the slope, pull out boards, drive forward, check again, repeat. A reliable bubble level mounted in a visible spot inside or outside your rig turns that whole process into a quick glance and a confident pull-forward. The E407 gives you that reference point without adding any bulk or requiring any installation hardware.
RV Designer is a well-established brand in the RV accessories space, producing practical, purpose-built products for the interior and exterior of travel trailers, fifth wheels, Class A motorhomes, Class C motorhomes, and truck campers. The E407 fits squarely in their leveling and setup accessories line -- a no-fuss tool aimed at making campsite setup faster and more repeatable.
Pre-applied adhesive backing bonds to clean, flat surfaces -- dash, cabinet, doorframe, or exterior compartment door. No screws, no drill, no mess.
Reads both side-to-side and front-to-back tilt simultaneously so you can level your rig on both axes with a single glance.
At 4.81 x 2.66 x 0.75 in. and under 0.1 lbs., the E407 fits in tight spaces without blocking controls, windows, or walkways.
Works on any RV type -- travel trailers, fifth wheels, Class A and Class C motorhomes, toy haulers, and truck campers -- anywhere you need a level reference.
An unlevel RV is more than just uncomfortable. Absorption-style refrigerators -- the most common type in travel trailers and fifth wheels -- require the unit to be within a few degrees of level to function correctly and to avoid damaging the cooling unit. Running an absorption fridge significantly off-level for extended periods can shorten its life or cause a complete failure of the cooling system.
Beyond the fridge, slide-outs extend and retract more smoothly on a level coach, water drains correctly from sinks and showers, and cabinet doors stay put instead of swinging open. A quick level check before you unhook is one of the fastest maintenance habits you can build -- and the E407 makes that check effortless.
Stick-on installation takes about 60 seconds, but a little prep goes a long way toward a permanent bond.
The E407 tells you how far off you are -- leveling blocks and a wheel chock system get you there. For a complete leveling setup, pair this indicator with a set of stackable plastic leveling blocks under your drive tires and a set of wheel chocks to lock position once you are level. Many RV owners also add a tongue jack pad under their stabilizer jacks for soft ground. The E407 is the reference point that ties the whole system together.