Size 
(A.S.W.G)

Diam of Head 
(Inch)

Approx. No. 
per lb

9 x 25 mm

7 mm

173

9 x 38 mm

"

122

9 x 50 mm

"

93

8 x 65 mm

8 mm

63

7 x 75 mm

9 mm

42