These staples fit the Rapid R28 cable tacker.
Made from stiff wire.
Type: 28 (white) divergent points.
Size: 10mm leg length.

Divergent points are specially cut points which guide the legs in a curve, instead of straight down into the material.

The Rapid RPD2810W 28/10 10mm DP x 5m White Staples comes in the following:
Quantity: 5 x 1000.