10 Galvanized Wire Cable Rope Thimble Marine Boat 1/4 Inch 6.3mm. Heavy Duty Galvanized Wire Rope Thimble. This premium heavy duty Galvanized Wire Rope Thimble has been designed tough and made from the highest quality materials. Product is backed by a no-hassle One Year Guarantee against defects. Quantity Included: 10 Wire/Rope Thimbles. Included: 10 Wire/Rope Thimbles. Size/Dimensions: 1/4" (6.3 mm). Material: Zinc - Plated. Strength: Light. Durable, ready to handle tough environments. One Year Guarantee against workmanship and defects.