This 500-45FS10B black fluoropolymer finish ETM magazine offers you the highest capacity and most reliable performance for your Full-Size .45 ACP 1911 handgun. 

Features:

• Caliber: .45 ACP
• Capacity: 10 rounds
• 1911 Size: Full size
• Black fluoropolymer finish
• Increased reliability in all 1911 pistols
• Aircraft grade certified stainless steel tube resists corrosion
• Strongest tube developed preventing cracked feed lips and tube spreading
• .025" tube walls
• Refined radius for each bend in the tube to take advantage of the strength in the stainless steel
• Proprietary custom designed welding process
• Multi-step tumbling and finishing process provides smooth follower operation and insertion into the weapon
• Observation slots moved to the rear of the tube exactly where they need to be to maintain the structural integrity required
• Innovative follower design with extended skirt ensures stability in operation and minimizes creep from the tube when your magazine is empty
• Fiber filled nylon follower 
• The ETM seats and locks in the weapon with the slide forward