The prokennex delta cb 10 is the most powerful squash racket in prokennexs range and the head is a large 77 in 497 cm size with a great sweet spot the combination of a head light balance and a low frame weight 145g 51oz means the racquet handles really well and can be swung through the air at higher speeds generating more power behind shots to give you that edge on court the frame of the delta cb 10 is made with graphite and reactonyl which give a high level of durability and stre