Hatch replica which you can get for US$26.50 for the whole elbow and knee pad set at RedWolf Airsoft. Not a bad deal at all... " Based upon a real steel protective pad system, the 9mm Tactical X-Tak Knee and Elbow Pad is extreme light and flexible yet provides superior protection and shock absorption when compared to traditional pads. 

Developed from direct input from Military and US S.W.A.T operators, the X-Tak Pads is designed with the unique X design which offers maximal mobility and protection whilst ensuring a comfortable fit. Although copied from the real steel manufacturers, 9mm Tactical very realistically replicates the X-Tak Protection Pads specifically for Airsoft use.

• The 9mm Tactical X-Tak Knee and Elbox Pads features:
• High Density Nylon woven outer Fabric.
• Lined with High Density Foam for Superior Shock Absorption.
• Unique X design reproduced.
• Lightweight Construction for Low Drag Operations.
• Rapid Deployment Clips for Quick Deployment.
• Fully Adjustable Spandex Velcro Straps.
• Anti-skidding Inner Surface to Keep Your X-Tak Nice and Secure.
• This set comes with both Knee and Elbow X-Tak Pads."