These are FLEXI Comfort Handle ALL BELT Retractable Leads.  There is no cord, but rather a belt for the length of this lead.

Mini All Belt Lead is 10 feet long for (pet's weight) UP TO 18 LBS.  Product wt. is 3.2 oz.

Comfort Grip All Belt 1 is 16 feet long for (pet's weight) UP TO 44 LBS. Product wt. is 8.1 oz.

Comfort Grip All Belt 2 is 16 feet long for (pet's weight) UP TO 77 LBS. Product wt. is 11.6 oz.

Comfort Grip All Belt 3 is 16 feet long for (pet's weight) MAX. 150 LBS. Product wt. is 19.0 oz.