8 XXX : kinbaku

Red Rope

gfycat.com category @itman290

Pink rope and a collar

imgur.com category @pepsi_next

collar

imgur.com category @bondduffs

[Request] Jump Rope

imgur.com category @DISTRACTED_

You can get far with just some rope and some duct tape

imgur.com category @BangAndAWhimper

Heavy duty collar I'd say

tumblr.com category @Myphoneacco

Rope, collar and corset

tumblr.com category @belt1234

Kathy Williams - Office Love-in, White-Collar Style (1968)

imgur.com category @[deleted]

Rope, tape, cuffs, collar, ball-gag.

imgur.com category @Addicted_to_reddit69

Red rope

imgur.com category @bubblr

Rope, tape, cuffs, collar, ball-gag.

imgur.com category @bubbleandslide

She's starting to panic a little but there's no need to hurry. He knows from past experience that the collar is secure

gfycat.com category @VeryTied