Springfield Jon Boat Seat Clamp - 8" to 20-1/2" [1104010] VendorSpringfield Marine Share WhatsApp Deel X Pin it Messenger Email Sale -$10.00 Springfield Jon Boat Seat Clamp - 8" to 20-1/2" [1104010] VendorSpringfield Marine Share WhatsApp Deel X Pin it Messenger Email Product form $57.99 $47.99 Quantity Add to cart This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted.