Gel Radical Pro Tennis Racket HEAD has combined Micro. GEL - a substance which weighs only about 3mg per cubic cm, but is able to support up to 4,000 times its own weight - with strong carbon composite fibres to create a racket which is incredibly responsive. On impact with the ball the HEAD Micro. GEL uniformly distributes the impact load around the frames circumference to provide a solid feel. The HEAD Micro. Gel Radical Pro is the latest version of HEADs Radical series inspired by Andre Agassi. This solid playing edition to the Micro. Gel line-up offers excellent access to spin and impressive ball speed off the stringbed thanks to an open 16/19 string pattern. Players with aggressive swings will find an appealing blend of power and control. Most suited for advanced players. Power Level: High. Swing Speed: Full. Headsize: 100in.2/645cm. Length: 27in./68.5cm Weight Strung: 332g. String Pattern: 16x19Beam Width: 20mm. Balance: 4pts head light. String Tension: 52-62lbs. Construction: Micro. Gel/Graphite. Grip Type: Hydro. Sorb. HEAD Micro