The Durablock AF4404, Round Block is designed to sand and block highly curved surfaces.
Dura-Block AF4404 Hand Sander 11" Tubular Round Block
Durablock AF4410, Marine Block
Durablock AF4405, Scruff Block
Bender Tool Die for WFB2 WFPB1000 Tubing 1-5/8" OD 5" Round Block Set
Dura Block AF44A 6 Piece Sanding Block Set AF4400 AF4401 AF4402 AF4404 AF4405