Teakwood Cylinder Block Set - 4 Rectangular Prism Blocks With 10 Sockets Each, Concave Faces For Firm Grip, Highly Polished Finish, Includes 40 Pencil Grip Knobs

This is a set of 4 blocks made of teakwood. Each of the blocks is a rectangular prism with concave faces to facilitate holding firmly. The surfaces are highly polished. Each block has 10 sockets and there are 40
knob bed cylinders that fit into these sockets. The knobs are the pencil grip type.
Block A: Varying in height from 5.5cms to 1cm, in regular intervals of 0.5cms.Diameter remains constant
Block B: Varying in diameter from 5.5cms to 1.5cm, with height remaining constant
Block C: Varying in height and thickness both increasing at regular intervals of 0.5 cms
Block D: Varying in height and thickness. But while the height increases, the diameter decreases.