This Seachoice 4 oz Signal Air Horn Kit is a must-have for any boat or ship owner. The kit includes a metal plunger blast air horn and a 4 oz air horn canister. The horn has a loud and clear sound that can alert others in case of an emergency. The kit is eco-friendly and does not contain any harmful chemicals. The manufacturer part number for this kit is 46311 and it is made by SEACHOICE/LAND&SEA INC. The item measures 3 inches in length, 6.35 inches in height, and 8.85 inches in width. It weighs 0.8 pounds and is designed to provide a signal for others in case of an emergency. The kit is classified under Other Boat & Ship Collectibles, Boats & Ships, Transportation, and Collectibles categories.