This version of the Iron Man forearm wrist armor is one sold part. So if you're unsure if your wrist will be able to squeeze through, go with the 2 part version of this, also in my store. It can be used with either the left or right arm and works with the Iron Man Mark IV/Mark VI upper ForeArm Armor. Designed to print at a thickness of .72mm, (minimum for Strong Flexible Plastic is .7mm). This saves on printing costs and WILL need some reinforcement on your end. Most people use fiberglass resin.