Scanstrut DS-HD6-BLK Double Horizontal Cable Seal - Waterproof Cable Gland for 5-6mm Cables | IP68 Rated, UV-Stable Plastic, Ideal for Solar Panels, Light Bars & Rooftop Electronics - Black

Easy to install and looks well also serves it purpose and construction and cable glands weather resistant.

This is by far the best option for running solar panel cables through the roof of a campervan. Easy to fit, requires minimal drilling and doesn't need to be blathered in silicone or sikaflex to make it waterproof.The gasket supplied provides a seal between the roof and the unit and then each cable entry has it's own seal which is compressed by the lid when it's screwed down.

Nice discrete size and quality item.

This cable seal is small and fits on one rib of a peugeot boxer van for example. it comes with an adhesive base that covers the whole base so not just a lip. holes are pre drilled so easy to line up.I fitted a 6mm2 wire and it was tight but did go through. 4mm would be no issues. Make sure to read the instructions as I didn't and had to rewire it all and put the wire through the lid first which was hard work with the 6mm cable.

Easy to install. How much neater is this than the crap plastic things! Bargain.