System fitted with decelerating device to regulate blind ascent. 300 cm w max. and 300 cm h max. The decelerating device, inside the winding tube, protects the blind by slowing down raising, so the system can also be used with light and washable fabrics. Stopping the blind in any position is guaranteed by the cam-type stop. The system is suitable for domestic and professional environments. 32 mm ø - 36 mm ø winding tube.