Simmer SDM SX4 Aluminium Extension Bases & Extensions Available in black or bright

Available in black or bright assorted colors (yellow

position to choose your preferred set up

By fitting a relatively low curvature central outline into a relatively short package

The batten above the boom has been moved

Simmer SDM SX4 Aluminium Extension Bases & Extensions Available in black or brightStainless steal fitting and new collar system. For SDM mast. SX4 SDM extension Universal Pin System with a quick release button. Durable aluminum tube combined with double pulleys for friction free, high tension downhauling. A great quality extension at an affordable price. Features Quick lock release. Stainless pulley system for less friction and greater durability. 0 cm extension possible.