When It Comes To Fitness, Choose Nothing But The Best. Izoo Name You Can Trust.Specifications:Material: Stainless Steel Spring And Rubber.Resistance: 10-40Kg (22-88Lbs)Size: 5.78X4.2X0.78 InchWeight: 200GmsPackage Included:1 X Izoo Adjustable Hand Grip ExerciserFeatures:Easily Adjustable Resistance From 22-88 Lbs (10-40Kg)Comfortable, Easy To Handle Design That Fits Any Hand SizeSmall And Portable To Fit Into Your Purse, Backpack Or Gym BagUses Durable, High Quality Stainless Tension Springs To Ensure This Hand Grip Exerciser Is Built To LastOur Hand Grip Exerciser Is The Best Among Others. Why?First, We Use Eco-Friendly Acrylonitrile Butadiene Styrene (Abs) Over Polypropylene (Pp) That Other Similar Hand Grippers Use. Abs Is 30% More Durable Than Pp Which Means Ours Is Built To Last.Second, We Use 100% Pure Stainless Steel Springs Which Prevents Rust And Helps Our Hand Gripper Last Longer.Both Of These Involve A Higher Investment For Us But We Think It'S Worth It To Create A Better Product.This Is Also A Great Diwali, Christmas, Mother'S And Father'S Day Gift Idea For Men, Women, Dad Or Mom.