Optitec V3 Compact Double Clamp Bracket 150mm Water Fittings With eight wheel sensors in With eight wheel sensors in the kit you can monitor the pressure and temperatures on all wheels including your spare tyres on both 4WD and caravan with the option of also being able to monitor your caravan wheel bearing and hub temperatures (sold separately) it fits easily into tight caravan bathrooms without cluttering your space The OW 15 Compact Double Clamp Bracket fits a chassis drawbar of 50mm x 150mm so it’s ideal for the biggest caravans These Compact Clamps are only 140mm wide so they can be mounted anywhere on the chassis and are perfect for Caravans using the Weight Distribution Bars