Six (6) knees of different heights, suitable for HO or N scale.   Cypress knees are common where Cypress grow in or near water.   If you desire a smaller knee, gently cut away part of the base with an X-Acto knife.   These are not wire-formed, so use care when handling to avoid damage.   Glue in place with white glue, caulk or hot glue.   Knees can tolerate products like WS Realistic Water or 2-part epoxy without changing shape.    Knees are the same color as my Cypress trees, but you may want to add darker color for Bald Cypress, or to indicate sitting in water.