The RAP-B-383U is a RAM Quick Release Track Base with a B Size 1" ball for kayak track mounting systems. It slides into compatible tracks and provides an adjustable RAM ball connection for rod holders, camera mounts, transducer arms, and other lightweight accessories. Key Features Quick release track base with B Size 1" RAM ball Designed for kayak tracks and common T-track systems Allows repositioning along the track Works with RAM B Size socket arms and compatible accessories High-strength composite construction Use Cases & Compatibility Designed for kayak mounting applications using compatible track systems, including common T-track style rails and SlideTrax-style tracks. The B Size 1" ball works with RAM B Size socket arms and related 1" ball components. Specifications Ball Size: B Size 1" Ball Material: High-strength composite Weight Capacity: Standard Use: 2 lbs; Heavy-Duty Use: 1 lb Dimensions: T-bolt dimensions: 0.248" x 0.93" Product Weight: 0.2 lb Brand & Warranty Brand: RAM Mounts Manufacturer Part Number: RAP-B-383U Warranty: Manufacturer's lifetime warranty Gadget Mounts is an Authorized RAM Mounts Dealer.