The Air Jack from Access Tools is the industries best. The bladder is made out of ballistic nylon, not rubber, which is important because rubber stretches, while the nylon wont. The Air Wedge is meant for smaller vehicles. To further aid insertion, there is a built in stiffener that prevents the wedge from bending when you insert it.

Features:

• Made of ballistic nylon
• Wont damage the vehicle
• Perfect for medium size vehicles to suv's and trucks
• Inflates easily and quickly
• Extremely durable
• Slides easily over weather stripping