Check the listing for details. Transition - BT-20 to BT-55 - 1.5" Long - Model Rocket Part. Condition: New. Listed at 4.49 USD. Balsa BT-20 to BT-55 transition with 1.5-inch taper. Please note that manufacturers sometimes update their products and packaging. If receiving a specific version of a product is important to you, please contact us before ordering. We combine shipping on orders for multiple items. When shopping for model rocket kits, parts, and supplies on eBay, please consider JonRocket's low shipping and handling fees. You pay the shipping charge for the one item you order which has the highest shipping charge. All the other items in your order ship for $1.50 each (or less).Please click the "Add to Cart" button (not "Buy It Now") to purchase this item. Using the cart makes it easier to purchase multiple items so that you save more on shipping.