
Carry a vertical picket design along your outdoor stairs with the SENMIT aluminum stair railing kit. The configuration pairs 36-inch stair panels with 39-inch posts, using 50 × 30 mm top rails and 40 × 30 mm bottom rails.

Visualize black vertical pickets between sloping rails as the railing follows an outdoor stair run.
AI-generated illustrative rendering, not a customer project or installation drawing. Review the stair geometry for your own layout.
Stair system dimensions
- Application: stair runs and stair-to-landing transitions
- Panel height: 36 inches
- Post height: 39 inches
- Top rail cross-section: 50 mm× 30 mm
- Bottom rail cross-section: 40 mm× 30 mm
- Square post cross-section: 55mm × 55 mm
- Decorative post base cover: 100 mm× 100 mm outer size, low-profile flat-top style
Select a length
Choose 4FT, 6FT, 8FT, 12FT, 16FT or 20FT. Provide the stair rise, run and landing dimensions so the panel arrangement and connections can be checked for your project. Confirm the measurement basis before ordering; do not substitute a horizontal projection for a sloping railing length.

See how the upright pickets and square posts frame a stair run between sloping top and bottom rails.
AI-generated illustrative rendering, not a customer project. The pictured layout does not specify a connector angle or kit packing quantity.
Kit configuration
This listing is the stair panel-and-post kit. Each post has a matching low-profile, flat-top decorative base cover to conceal the mounting plate and fixings. The cover measures 100 × 100 mm externally; this is not the mounting plate size. The itemized number of panels, posts, connectors, fasteners and any separate mounting items must be confirmed for the selected length. A kit length is not a promise of one continuous panel, and no universal stair-angle range is specified here.
Email your stair measurements to sales@senmit.com before ordering if the layout or connections are uncertain.
Product details
Product details
Carry a vertical picket design along your outdoor stairs with the SENMIT aluminum stair railing kit. The configuration pairs 36-inch stair panels with 39-inch posts, using 50 × 30 mm top rails and 40 × 30 mm bottom rails.

Visualize black vertical pickets between sloping rails as the railing follows an outdoor stair run.
AI-generated illustrative rendering, not a customer project or installation drawing. Review the stair geometry for your own layout.
Stair system dimensions
- Application: stair runs and stair-to-landing transitions
- Panel height: 36 inches
- Post height: 39 inches
- Top rail cross-section: 50 mm× 30 mm
- Bottom rail cross-section: 40 mm× 30 mm
- Square post cross-section: 55mm × 55 mm
- Decorative post base cover: 100 mm× 100 mm outer size, low-profile flat-top style
Select a length
Choose 4FT, 6FT, 8FT, 12FT, 16FT or 20FT. Provide the stair rise, run and landing dimensions so the panel arrangement and connections can be checked for your project. Confirm the measurement basis before ordering; do not substitute a horizontal projection for a sloping railing length.

See how the upright pickets and square posts frame a stair run between sloping top and bottom rails.
AI-generated illustrative rendering, not a customer project. The pictured layout does not specify a connector angle or kit packing quantity.
Kit configuration
This listing is the stair panel-and-post kit. Each post has a matching low-profile, flat-top decorative base cover to conceal the mounting plate and fixings. The cover measures 100 × 100 mm externally; this is not the mounting plate size. The itemized number of panels, posts, connectors, fasteners and any separate mounting items must be confirmed for the selected length. A kit length is not a promise of one continuous panel, and no universal stair-angle range is specified here.
Email your stair measurements to sales@senmit.com before ordering if the layout or connections are uncertain.
Shipping & Returns
Shipping & Returns
In-stock aluminum railing products: estimated delivery within 5–7 days after ordering. You may request a return or exchange within 30 days of delivery, subject to the store's return conditions.
Read the Shipping Policy and Refund Policy for details, including return authorization, restocking charges and shipping costs.