Blue day time smoke by Trafalgar Fireworks.

This smoke grenade produces a thick plume of blue smoke for approximately 60 seconds.

Blue Day Time Smoke Specifications
Carton Quantity: 1 x Blue Smoke Grenade 
Approx Duration: 60 Sec
Firework Dimensions: 25cm x 3.5cm
Noise Rating: 0/10
Classification: 1.4G
Safety Distance: Outdoor use only