Shop Prop Alert and Flag Alert Shop the new Prop Alert+ products . Designed to fit motors of 200 Horsepower or larger. Orange Caution +$39.99 Orange Bass+$39.99 Orange Back Off+$39.99 Red Caution+$39.99 Custom Prop Alert+$59.99 Shop our large-sized Prop Alert products. Designed to fit motors from 90 to 175 horsepower. Orange Back Off Large$34.99 Orange Caution Large$34.99 Orange Skull Large$34.99 Orange Bass Large$34.99 Red Caution Large $34.99 Red Bass Large $34.99 Custom Prop Alert – Large$54.99 Shop the small Prop Alert products. Designed to fit motors from 90 horsepower or less. Orange Caution Small$29.99 Orange Bass Small$29.99 Shop our Flag Alert products. Perfect for Flagging protruding objects from your vehicle. Flag Alert$11.99