Here's what other sites are saying:
Maxims Tech Cord is the lightest cordellete or chock cord available.
Maxim tech cord is made with a polyester sheath to be friendly to the hand, and a core of "bombproof" 100% Technora. The core is made with a parallel fiber layout to maximize strength. This cord is great for slinging hexes and chocks and works superbly for cordelettes. Tensile strength: 5000lbf. Size: 5mm/ 20 feet/ 6 meters.
PMI Multi Cord 3mm
BlueWater Ropes 5.5mm Titan Cord
BlueWater Ropes Accessory Cord
Petzl Climbing Cordage 7mm
$13 - $244
Ultimate Survival Technologies Paracord 325 Utility Cord
Beal Accessory Cord 4mm
Sterling Rope Accessory Cord
$11 - $41
Beal Dyneema 5 mm Cord