Please compare our specs with the other top Opti race spars out there. The big difference is the price! You do not have to spend over $600 to have your Opti sailor outfitted with top quality race level spars. ADVANTAGES : over spars from other mast makers -Drilled before the tubes are anodized for resistance to corrosion -German Monel top quality Rivets - Harken blocks included -Measurement bands on the mast and trim scale on the boom -Delrin Mast butt for either post or cup mast steps -Riveted Stainless Steel Backing plate inside the Mast to prevent wear Aluminum specs; -Mast- 7075T6 * 45 mm Diameter * 2.3 mm Wall thickness * 2327 mm Length -Sprit- 7075T6 * 27 mm Diameter * 1.6 mm Wall thickness * 1990 mm Length -Boom- 6061T6 * 40 mm Diameter * 1.2 mm Wall thickness * 2220 mm Length -40mm is Boom stiff enough for the widest range of Sailors No need to get multiple booms as your sailor grows. UPS Ground in the Continental US is under $30.00. We charge the actual delivery price after shipment. Black Widow Opti Spars BWSRegular price: $450.00Sale price: $399.00 Due to the wide variety of the size and weight of our items we will charge the actual cost of shipping in a separate charge on all orders. Please email us for a shipping cost estimate. Shipments outside the USA may have add on fees and duties by your own government. Send us email 200 Bald Hill Rd. Warwick, RI 02886 Voice 401-738-8000 Fax 401-738-0883 Sailing can be green! See our recycle your old sail offer