The recommended parachute with small
balloons (< 200 g) is the Totex type 280V-17 (Vaisala code 249041). See option 1 in Radiosonde RS41 optional
accessories.
The parachute has an elastic ribbon loop below the spreader. Attach the unwinder to the
loop by pushing the hook out the other side in the same fashion as with the folded balloon
neck.