SPARE "MINI" RUBBER BULB w/free mounting tips booklet & protectant - fits antique taxi, clown and bicycle-size horns BRAND NEW: Budget price. Bench tested. Satisfaction Guaranteed. JUST SCREW-ON AND HONK: Fits bicycle-size Mini horns. (Does NOT fit Circular, Large, Small, and Straight bulb horns.) FREE EIGHT-PAGE FULL-COLOR ILLUSTRATED BULB MOUNTING TIPS BOOKLET packed with each shipment. HAND APPLIED PROTECTANT extends life of rubber - guards against ozone, oxidation and UV radiation. CERTIFIED INSPECTION: Authentic Folkroots bulb horn products include official inspection certificate verifying item was bench tested, passed, and guaranteed by Bone Dry Musical Instrument Co.