Material: sponge foam + PU foreskin push rod universal grip.

Flatso 1.0:

1.10 " 28mm 10.50 "  26mm  85g 0.58 "

Flatso 3.0: 

1.40 " 35mm 10.50 " 26mm  60G 0.58 "

(Weight tolerance +/- 2g)